St. Basil's Cathedral, Moscow (must see)

St. Basil’s Cathedral, formally the Cathedral of the Intercession of the Most Holy Theotokos on the Moat, was built in 1555–1561 on the orders of Tsar Ivan IV (Ivan the Terrible). It commemorated the conquest of the Kazan Khanate, rather than both Kazan and Astrakhan specifically.

Later sources identify its builders as Postnik and Barma, although the relationship between these names and the architects involved remains a subject of historical discussion. The cathedral consists of a central Church of the Intercession surrounded by eight smaller churches, creating the original nine-part ensemble. A separate church dedicated to Basil the Blessed was added in 1588 above his burial place, bringing the complex to ten churches. Its familiar colorful appearance developed gradually over several centuries. The original helmet-shaped domes were replaced by shaped domes during the late sixteenth century, while extensive exterior painting and decorative additions transformed the façades during the seventeenth century. Inside, narrow passages, steep stairways, galleries, small chapels, icons, and wall paintings form an intricate network of spaces that contrasts with the cathedral’s monumental exterior composition. Following the Russian Revolution, the cathedral eventually became a museum rather than functioning solely as a church. Today, it forms part of the State Historical Museum, although religious services are still celebrated on selected occasions.

Visitors can explore its individual churches, galleries, historic paintings, and architectural details. In 1990, the cathedral was included with the Kremlin and Red Square in the UNESCO World Heritage property “Kremlin and Red Square, Moscow,” recognizing the historical and architectural importance of the ensemble.