A treasure bestowed with the prestigious UNESCO World Heritage status, Park Güell stands as a testament to Antoni Gaudí's imaginative brilliance, representing the zenith of his naturalist phase and captivating the essence of his whimsical style. Originally envisioned in the 1890s as a grand garden city for Barcelona's affluent families, this visionary project remained unfinished. However, the marvel we behold today emerged through the dedicated efforts between 1910 and 1914, finally unveiling its allure to the public in 1922.

Nestled upon the picturesque slopes of Carmel Hill, Park Güell unfolds as a mesmerizing landscape adorned with Gaudí's ingenious creations. Among them, a pair of enchanting pavilions, a tiled salamander, and the world's longest bench beckon visitors into a realm reminiscent of a storybook. Noteworthy among these structures is the "Casa del Guarda" (Caretaker's House), crafted with meticulous detail.

While access to the Monumental Area, showcasing Gaudí's most remarkable works, requires a ticket, the verdant expanses surrounding this realm are open for exploration and free to wander. Venture into the Room of a Hundred Columns, a cavernous hall adorned with 84 gracefully curved pillars, originally conceived as the estate's marketplace. Above, the Gran Plaça Circular offers an open expanse with a sinuous balcony of mosaic patterns that offers breathtaking panoramic views of the city.

At the park's entry, two pavilions crafted by Gaudí greet visitors, while the Casa Museu Gaudí, a gingerbread-style abode that served as Gaudí's residence from 1906 to 1926, was built by architect Francesc Berenguer.

Why You Should Visit:
Amazing park with mesmerizing tiled designs, boasting a vibrant palette of colors. Perfect for any day when you seek to bask in the beauty of the outdoors.

Tip:
Within the park, you have the opportunity to capture the ultimate Barcelona photograph, presenting two enticing options: the iconic mosaic-covered salamander, a symbol of the park's charm, and the breathtaking vistas from the Gran Plaça Circular.

The Basilica and Expiatory Temple of the Holy Family, commonly known as La Sagrada Família, is an iconic, unfinished church in Barcelona designed by Catalan Modernist architect Antoni Gaudí. Construction began in 1882 with architect Francisco de Paula del Villar, who envisioned a Gothic revival-style church. Upon taking over the project in 1883, Gaudí transformed the design into a unique blend of Gothic and Art Nouveau styles. Despite spending an impressive 43 years of his life designing this monument, by the time of Gaudí's death in 1926, only 15-25% of the basilica had been completed.

Relied on private donations, the construction has faced multiple interruptions like the Spanish Civil War in the 1930s. Modern technology has sped up the progress, however, and the church is now set to be finished by 2026, with further decorative work expected until 2034.

The Sagrada Família features eighteen planned spires symbolizing the Twelve Apostles, four Evangelists, the Virgin Mary, and Jesus Christ. Thirteen spires have been completed so far. The basilica’s three façades-the Nativity, Passion, and Glory-each represent different phases of Christ’s life and showcase a blend of naturalistic and minimalist styles.

The interior, designed as a Latin cross with five aisles, showcases Gaudí’s mastery of geometry and organic forms. The central nave vaults reach 45 meters, while the apse vault extends to 75 meters. The columns, which change shape as they rise, contribute to the basilica’s distinct look. Gaudí's use of hyperboloid structures and ruled surfaces enhances both the stability and aesthetic appeal of the building.

As of 2017, visitors can book tickets online to access various parts of the basilica, including the Nave, Crypt, and museum, as well as the Passion and Nativity steeples. A visit to the steeples includes a challenging descent through a narrow spiral staircase of over 300 steps. Also of note is the museum below, offering a wealth of information, including audiovisual presentations about the Sagrada Família project's history, plans, and Gaudí himself. You may also want to visit the small school built by Antoni Gaudí for the children of the construction workers right on the site.

Once completed, the Sagrada Família is to become the tallest church in the world and a lasting testament to Gaudí’s vision of blending architecture, nature, and spirituality.

Tip:
Please note that children under 6 are not permitted to ascend the towers; some adults may find the spiral staircase challenging too. If you decide to climb, ask the staff for directions to the "backside elevator", as it is usually less crowded.

Milà House, commonly known as La Pedrera ("The Stone Quarry"), is a modernist masterpiece designed by Antoni Gaudí and located on Gràcia Boulevard in Barcelona. Constructed between 1906 and 1912 for Roser Segimón and her husband Pere Milà, its nickname derives from its stony, fortress-like appearance. Gaudí, however, viewed the structure as a living body, with columns as bones and stone as flesh.

The building’s wavy stone façade and wrought iron balconies were highly controversial at the time for their unconventional design. Gaudí introduced several innovative features, such as a self-supporting façade, free-plan floors, and an underground garage. The structure, inspired by natural forms, incorporates curved surfaces and catenary arches in the attic, while its layout around courtyards ensures natural light reaches all nine stories. The distinctive roof terrace, with sculptural chimneys and skylights, offers panoramic views of the city and is known as "the garden of warriors."

Following initial criticism and conflicts with Roser Segimón over the aesthetic details, Milà House has undergone significant changes throughout its history. Originally intended as a private residence, it was later sold, converted into apartments, and eventually fell into disrepair. It was restored in the 1980s, regaining its original colors and features, and was declared a UNESCO World Heritage Site in 1984.

Today, Milà House serves as a cultural center, featuring an exhibition on Gaudí’s life and work, showcasing models, drawings, and photographs of his architectural creations. The fourth floor showcases a recreation of an early 20th-century apartment, giving insight into the lifestyle of affluent families of that period.

Milà House is a testament to Gaudí’s architectural innovation and his challenge to conventional design norms. Over the years, it has inspired many modern buildings worldwide, including the Guggenheim Museum in New York City and Disney Concert Hall in Los Angeles. Today, it stands as one of Barcelona’s most iconic landmarks, attracting visitors from around the world to experience Gaudí’s visionary creativity firsthand.

Tip:
To avoid waiting in line, try and book your ticket online in advance and, if possible, visit around sunset when the lights are on, allowing you to experience the surreal audiovisual show. During the summer months, jazz and flamenco concerts are often held here, which is quite a treat as well.

Batlló House, located in the heart of Barcelona's prestigious Gràcia Boulevard, is one of Gaudí’s most celebrated architectural masterpieces. Originally built in 1877 by Lluís Sala Sánchez, the building underwent a radical transformation in 1904 when textile industrialist Josep Batlló hired Antoni Gaudí to renovate it. Gaudí expanded the structure, creating new floors and adding his signature audacious design, which turned this previously unremarkable building into a landmark of Modernist architecture.

Batlló House is often referred to as the "House of Bones" due to its skeletal-like balconies and organic forms. Another local name for it is the "House of the Dragon," as its arched roof, covered in colorful mosaic tiles, is said to resemble the spine of a dragon. This symbolism aligns with the legend of Saint George (Catalonia’s patron saint), whose lance is represented by the turret and cross atop the roof.

The building's façade is divided into three sections and adorned with vibrant broken ceramic tiles in shades transitioning from orange to greenish-blue. Gaudí’s use of curves, irregular windows, and sculpted stonework avoids straight lines, enhancing the structure’s flowing, dynamic feel. Inside, the loft space, with its catenary arches, imitates a ribcage, while the central atrium features blue tiles that create an underwater-like light distribution.

The rooftop is a highlight of Batlló House, with its chimneys resembling twisted, tiled sculptures. The entire structure integrates symbolism and decorative elements that showcase Gaudí’s innovative approach to form and function. After the Batlló family left in the 1950s, the house changed ownership several times and was refurbished before becoming a venue for events in 1995. In 2005, Batlló House was designated a UNESCO World Heritage Site, cementing its status as a masterpiece of modernist architecture.

Tip:
For a fee, you can have your photo taken on the small balcony at the front of the building (as you descend from the rooftop), receiving both a printed copy and an electronic version for a memorable keepsake.

Gràcia Boulevard, located in the heart of Barcelona’s Eixample district, is one of the city’s most significant shopping and business areas. Formerly known as "Jesus Road", it was initially a rural lane connecting Barcelona to the then-separate town of Gràcia. The avenue’s development began in 1821 but was delayed by epidemics and eventually resumed in 1827. The 42-meter-wide boulevard soon became a favorite spot for the aristocracy to showcase their horse-riding skills and luxurious carriages.

By the early 1900s, Gràcia Boulevard had transformed into the city’s most fashionable street. The architect Pere Falqués i Urpí designed its renowned wrought-iron benches and street lamps in 1906, largely adding to its unique charm.

During the Spanish Civil War, the Basque government was based here, and the Catalan poet Salvador Espriu lived in Casa Fuster (at Number 132). Today, Gràcia Boulevard is the most expensive street in Barcelona and Spain, comparable to the Champs-Élysées in Paris or 5th Avenue in New York City. The avenue is lined with upscale stores, though more affordable dining options can be found in its side streets.

More notably, the avenue is home to remarkable Modernist architecture by famous architects such as Antoni Gaudí, Josep Puig i Cadafalch, and Lluís Domènech i Montaner, concentrated along the main street and some of the adjacent streets as well. Major highlights include Gaudí's “La Pedrera” building and the so-called “Block of Discord,” a cluster of Modernist masterpieces. With most mansions here belonging to Barcelona's wealthiest citizens of the late 19th and early 20th centuries, there's no shortage of richly and tastefully decorated facades to behold. Buildings, balconies, stained-glass windows, and carved doors are all within sight.

Day or night, Gràcia Avenue offers a fantastic opportunity for architecture buffs to crane their necks. In addition to these, the Gaudí-designed pavement tiles depicting abstract sea creatures make it a top destination for strollers, offering a visual feast of Barcelona’s rich urban heritage.

Tip:
This boulevard is particularly magical in summer when the locals compete between themselves decorating the streets as part of the Gràcia Festival, which, together with the live music played everywhere, makes it a really fun place to be.

The Palace of Catalan Music in Barcelona, designed by Lluís Domènech i Montaner, is a hallmark of Catalan Art Nouveau architecture. Built between 1905 and 1908 for the Orfeó Català choral society, it was inaugurated in 1908 and awarded the Barcelona City Council’s 1909 prize for best building. The Palace represents a unique blend of curves, floral motifs, and advanced materials like steel framing.

The exterior features a fusion of Spanish and Arabic architectural elements, including exposed red brick, iron, mosaics, and stained glass. Two colonnades with colorful tiles and busts of composers, such as Bach, Beethoven, and Wagner, adorn the façade. Inside, the concert hall-Europe’s only auditorium illuminated entirely by natural light during daytime-seats around 2,200 people. Among other elements, it features a large stained-glass skylight by Antoni Rigalt and sculptures by artists like Eusebi Arnau and Lluís Bru, portraying themes of choral and classical music.

The Palace's main attraction is on the first floor, where modernist artistry is showcased through a spectacular stained glass ceiling and intricately decorated surfaces. The highlights include three-dimensional muses emerging from the walls and a stunning proscenium featuring Valkyries in motion. Despite its visual beauty, the hall’s glass walls present acoustic challenges, as noted by certain critics. Nevertheless, the Palace remains a symbol of Catalan modernism and a must-visit landmark in Barcelona.

Major renovations between 1982 and 1989 restored it to its original grandeur while adding modern amenities like dressing rooms, a library, and an archive in an adjoining six-story building. Further restoration in 2006–2008 included reinstalling the lantern and other ornamental features.

To fully appreciate the craftsmanship, guided tours are recommended and often require advance booking. For a more casual experience, visitors can enjoy coffee or tapas at the foyer bar, while admiring the detailed interior. Presently a UNESCO World Heritage Site since 1997, the Palace hosts over half a million visitors each year, drawn by its architectural splendor and vibrant cultural programs ranging from classical music to jazz, with top-notch lighting making each show a memorable experience.

Tip:
Don't forget to bring opera glasses or binoculars to fully appreciate the details, and be sure to check out the café on the ground floor for a pleasant treat.

Daily Tours:
10 am–3:30 pm (advance booking recommended)

The Cathedral of the Holy Cross and Saint Eulalia, commonly known as Barcelona Cathedral, is a delightful combination of a church, mini-park, and a house of prayer, offering a serene alternative to the renowned La Sagrada Família. As the seat of the Archbishop of Barcelona, it was primarily constructed between the 13th and 15th centuries.

The cathedral has a pseudo-basilica layout with five aisles and a raised high altar. It is dedicated to Saint Eulalia, a young martyr whose relics are housed in the white marble sarcophagus inside the crypt. An intriguing feature is the presence of 13 geese in the cloister, symbolizing Saint Eulàlia's age at the time of her death.

Inside, the cathedral showcases choir stalls adorned with the coats-of-arms of the Order of the Golden Fleece. The Chapel of the Holy Sacrament contains a cross associated with the 1571 Battle of Lepanto and has been reconstructed to hold the tomb of San Olegarius, a former bishop of Barcelona.

The cathedral’s origins trace back to an early Christian and Visigothic complex that was damaged during a Muslim attack on Barcelona in 985. It was replaced with a Romanesque church in 1046 before the current Gothic cathedral began construction in 1298. The cathedral took 150 years to complete yet its neo-Gothic façade, featuring gargoyles and other mythical creatures, was finished only in 1913. Unlike many other churches in Barcelona destroyed during the Civil War, this Gothic temple was spared.

An exemplary piece of Catalan Gothic architecture, emphasizing balanced proportions over verticality, the cathedral measures 93 meters long, 40 meters wide, and 28 meters high at its central nave, with bell towers reaching 54 meters and the central peak at 70 meters.

The Cathedral of Barcelona is also famous for giving rise to the unique Catalan tradition of "dancing egg." Observed during the feast of Corpus Christi (also known as the Solemnity of the Most Holy Body and Blood of Christ), this tradition features an egg balanced on a water fountain’s jet.

The cathedral's cloister contains a gift shop. Cellular phones have been banned from the Chapel of Lepanto and other chapels. While exploring the cathedral's interior, make sure to venture up to the lofty roof terrace. You will be rewarded with views of the cathedral's towers, pinnacles, cimborio, and the Cloister, and a 360-degree view of the city!

Tip:
Cathedral Visit (including Choir entrance + Access to the rooftop, Chapter hall, and Virtual Audio guide) is €9.00.
Cathedral + Museum (including Choir entrance + Access to the rooftop + Chapter hall + Virtual Audio guide + Museum) is €15.00.

The Temple of Augustus, formerly a central piece of the Roman colony of Bàrcino, is a significant historical site preserved within the headquarters of the Excursionist Center of Catalonia. Embedded within a Gothic-period building, it features four Corinthian columns, remnants of the only known temple in Roman Barcino. Believed to have been dedicated to Emperor Augustus, the temple occupied the highest position of the ancient city, near the current Saint James's Square.

At some point, it was demolished, and its remains were hidden until the late 19th century when three of its columns emerged at the construction site of Catalonia's Hiking Club. Subsequently, a fourth column was revealed at King's Square and later incorporated into the structure, as it stands today.

According to research, the temple was originally surrounded by 11 columns on each side, including corner columns, with six columns at the front and another six at the rear. The entire building would have measured 17.5 by 44 meters, elevated on a podium approximately one-third the height of the columns. Noted for their fluted design and Corinthian capitals, the columns have been documented since the 14th century, although their origin is subject to various interpretations. Historical figures, from mythical kings to suggestions of aqueduct parts, have been proposed as explanations for their presence.

Although initially misattributed to the Carthaginians, later studies by Modernist architect Josep Puig reaffirmed the temple’s dedication to Emperor Augustus, placing its construction in the early Roman Empire, which indeed correlates with Barcino’s founding during Augustus's rule.

When visiting this site, keep an eye out for helpful photographs and recreations of this ancient landmark.

The Basilica of Saint Mary of the Pine, a quintessential 15th-century Gothic church in Barcelona, has weathered the passage of time, surviving natural disasters, wars, and deliberate destruction.

Initially documented in 987 as a small Romanesque church, it was dedicated to the Blessed Lady of the Pine Tree, which is one of the titles of the Virgin Mary. Others say that the church's name also derives from the solitary pine tree that once stood in the marshy lowland beyond the 4th-century Roman walls. The present church was constructed between 1319 and 1391 and was consecrated in 1453. Its design is noted for its Catalan Gothic style characterized by a stark, ornament-free single nave. The bell tower, initiated by Peter the Ceremonious, King of Aragon, in 1379, was completed almost 120 years later.

The catastrophic earthquake of 1428 and the early 18th-century bombings during the War of the Spanish Succession caused extensive damage to the church's facade, presbytery, main altarpiece, and stained glass windows. Restoration efforts, begun in 1717 and continued up until 1915, resulted in the removal of many Baroque decorations.

Another devastating event occurred in 1936 when anarchists set the church ablaze, seeking to destroy it. However, the church was meticulously restored after the Civil War. The restoration included the Gothic arch marking the main entrance and the large front façade rose window, destroyed by fire and replaced by a replica in 1940. The side façade displays prominent buttresses and lancet windows, while the rear façade continues this theme and includes an ancient door from 1578. The oldest surviving windows in the church date back to 1718.

Internally, the church's nave extends 54 meters in length and is defined by vaulted ceilings and side chapels. Upon entering, two interesting features await – the original wooden choir loft and the painting of "Our Lady of the Helpless" by the 18th-century Spanish artist Ramón Amadeu. The latter is said to have used his wife and children as models for the Virgin and children in the painting.

Presently, the church frequently hosts classical guitar concerts by renowned soloists. Guided tours of the basilica and the bell tower are available in English, with prior reservation.

Tip:
If you visit early or late, admission to the church is free (otherwise, there is a nominal fee). For a few extra euros, you can ascend the bell tower and enjoy a panoramic 360-degree view of the city. However, do take note of the timing, as the tower closes after dusk.

Situated to the north of La Rambla and a few blocks south of Catalonia Square, the Market of Saint Joseph de La Boqueria is extremely busy no matter what time of day or season you come. Colloquially referred to simply as La Boqueria, this large public market is one of Barcelona's foremost tourist landmarks with a broad choice of goods on offer.

Initially, the area was an unofficial extension of the New Square market. The name "Boqueria" possibly originates from the Catalan word "boc" for goat, indicating a place for selling goat meat. Indeed, the first mention of La Boqueria, as the meat market near the old city gate, dates back to 1217. By 1470, it was renamed “pig market” and afterward remained known as a straw market, up until 1794.

In 1826, the market gained an official status, and in 1835, plans were made for a formal structure on La Rambla. Construction began in 1840 and the market officially opened the same year. After several modifications, the building was inaugurated in 1853. A new fish market was added in 1911, and the current metal roof was installed in 1914, giving the market its present look.

Despite the constant flow of visitors, the experienced vendors efficiently handle the crowds, and the market's spacious layout helps ensure an enjoyable shopping experience. La Boqueria offers a fantastic opportunity to explore traditional Catalan cuisine. Here, you can take yourself on a tapas tour, sample exquisite jamón with cheese, purchase the world's freshest saffron (sold in various-sized small boxes), and enjoy local seafood (except for Sundays and Mondays when no fish is sold), plus discover many other culinary delights.

Also, don't miss the chance to try the freshly cooked fish at Kiosko Universal (a sit-down counter and bar-like place) or indulge in the wide variety of olives and delicious fresh fruits. Venture deep into the market to find the best stalls and taste a little bit of everything – you won't be disappointed.

Tip:
Keep in mind that the area is known for pickpocketing incidents, so whether you're alone or with friends, it is recommended to be vigilant and keep a close eye on your belongings.

Nestled in a discreet corner off the bustling La Rambla, the Güell Palace is an inaugural masterpiece of the architect Antoni Gaudí in Barcelona, which swiftly propelled him to international acclaim.

Now part of the UNESCO World Heritage Site called the "Works of Antoni Gaudí", this mansion was built between 1886 and 1888 for the industrial tycoon and Gaudí's lifelong patron, Eusebi Güell. The building showcases Gaudí's innovative use of iron supports as decorative elements, featuring twisted columns, arches, and intricate ceilings, topped with a whimsical array of tiled chimneys on the roof terrace.

Designed for high-society gatherings, the home’s central room has a tall ceiling, soaring three floors high, with a cupola. At night, to produce the appearance of a starlit sky, lanterns were hung from the outside through the small holes near the top. Arriving in horse-drawn carriages, guests entered the property through grand oval gates adorned with ironwork resembling seaweed. Horses were taken to a livery stable in the basement, while guests ascended to the receiving room. The walls and ceilings of this room contain discreet observation holes, allowing the owner to view guests from above before making an entrance.

With no budget constraints, Gaudí utilized the finest materials and craftsmanship to create a space that blends function and artistry seamlessly. This residence served as a preview of Gaudí’s future architectural innovations and his flair for combining structural elements with imaginative design.

Being slightly tucked away from the renowned La Rambla promenade, this lesser-known gem attracts fewer tourists, while offering a delightful opportunity to admire Gaudí's work in the charming old quarter of the city.

Tip:
The building's highlight is the rooftop terrace and its colorful chimneys adorned with mosaic and broken tiles. Note: on a rainy day, the rooftop may be closed, so it's advisable to check in advance the weather forecast to ensure a pleasant visit.

Pulsating with energy, particularly during the peak tourist season, La Rambla is the most famous street in Barcelona and one of Europe’s most lively urban promenades. Stretching 1.2 kilometers from Catalonia Square to the Christopher Columbus Monument at the Old Port, it cuts through the Gothic Quarter and El Raval neighborhoods. Legendary Spanish poet Federico García Lorca famously described this bustling thoroughfare, teeming with colorful shops, charming pavement cafes, souvenir kiosks, and an eclectic mix of visitors, as “the only street in the world which I wish would never end.”

La Rambla is composed of several smaller sections, known collectively as “Les Rambles.” These include Canaletes Rambla, known for its fountain; Rambla of Studies, the site of a former Jesuit university; Rambla of Saint Joseph, home to a flower market; Rambla of the Capuchins, featuring the Liceu opera house; and Rambla of Santa Mònica, named after a local convent.

Originally a sewage-filled stream, La Rambla’s name comes from the Arabic word for "sand," dating back to the times when it functioned as a rainwater drain. By the late 14th century, the city expanded its walls to include La Rambla, which later transformed into a lively promenade.

Over time, La Rambla became a hub for festivals and commerce. Trees were planted along its path in 1703, with plane trees, in particular, added in 1859. Notable local landmarks include the Liceu Grand Theatre, Barcelona's renowned opera house, and the Palace of the Viceroy, a Baroque mansion now hosting exhibitions and events. The street also features a Joan Miró pavement mosaic and connects to the famous La Boqueria market, offering a plethora of local delicacies, as well as the Royal Square popular for its nightlife.

Prices at La Rambla are a bit steeper than elsewhere in the city, but then again, excitement comes at a price, and La Rambla sure gives tonnes of it.

Tip:
As you stroll along, remain vigilant against the occasional presence of pickpockets-keeping your eyes open is always a good idea.
For excellent food at more affordable prices and the opportunity to savor your meal in a relaxed setting, venture to the Santa Caterina market, just a 10-minute walk away from La Boqueria.

The 60-meter Columbus Monument at the lower end of Barcelona's La Rambla was built for the 1888 Barcelona Universal Exposition. Honoring Christopher Columbus’ first voyage to the Americas, the monument symbolizes his return to Barcelona, upon which he reported to Queen Isabella I and King Ferdinand V.

The structure features a 7.2-meter bronze statue of Columbus atop a 40-meter Corinthian column. Originally intended to face west, towards the Americas, Columbus is instead depicted pointing east – reportedly towards his birthplace of Genoa, Italy. Others, however, believe that it simply strikes a dramatic pose toward the sea, symbolizing Columbus’ achievements in naval exploration. The statue stands on a base inscribed with the word "Tierra," which means “land”. Below it, the column is supported by an octagonal pedestal adorned with bronze victories, griffins, and medallions representing figures related to Columbus.

The pedestal’s base includes sculptures of historical figures, such as cartographer Jaume Ferrer and Catholic preacher Father Bernat de Boïl, along with bas-relief panels that illustrate significant moments from Columbus’ voyage, including his departure from Palos de la Frontera and his meeting with the King and Queen in Barcelona. Additionally, the monument’s base features coats-of-arms from locations that Columbus visited, such as Puerto Rico and Cuba.

The idea for the monument originated in 1856. Funded mostly through private donations, it was completed in 1888. The monument is exclusively a Catalan endeavor, with all the labor and materials sourced from the region, thus symbolizing the Catalans' recognition of Christopher Columbus as one of their own, despite his Italian origins.

Tip:
Take the time to go around the monument and observe the sculptures showcased at its base.
Inside the column, visitors can take an elevator to a viewing platform for a sweeping panorama of the surrounding area.
Also, check out the wine bar at the monument's cellar and a boutique offering unique souvenirs and gifts that surpass the mass-produced items found at street vendors.
A combined ticket for both the lift ride and wine tasting can be obtained at the base of the monument.

Viewing Platform:
Daily: 8:30 am–2:30 pm