Casa do Infante (Prince Henry's House), Porto

Prince Henry’s House—formally the old customs house, but with a name that sounds far more adventurous—was first built in the 14th century. Reshaped in the 1600s, it once handled the city’s trade, minted its coins, and kept a close eye on everything moving along the Douro. According to local tradition, it also happens to be the birthplace of Henry the Navigator in 1394—so yes, this modest-looking building has a surprisingly impressive track record.

Its story began in 1325, when a royal decree ordered a customs house to rise here, right over the remains of a Roman villa. By 1327, it was already up and running. A few decades later, tensions between King Afonso IV and the Bishop of Porto over river taxes led to the construction of a new, more imposing medieval complex. Positioned right by the water, the building pulled quadruple duty: customs office, mint, warehouse, and, for good measure, living quarters for staff.

Architecturally, it’s less about symmetry and more about layers. Four interconnected spaces unfold under different ceiling styles, while the façade stacks four levels of windows above a grand arched entrance marked with the royal coat of arms and a 1677 inscription. Inside, a central courtyard links the structure together, with arcades dividing the main hall into three naves and a staircase threading its way upward. At the back, tall windows flood the stone floors with light, tying the various sections into one continuous, slightly labyrinthine whole.

Over time, each new use left its mark, turning the building into a patchwork of styles rather than a single, clean statement. More recently, archaeology took action and went even deeper—literally—uncovering Roman foundations and mosaics now displayed on-site. Today, the space functions as a compact museum, where interactive exhibits trace Porto’s evolution from Roman outpost to maritime powerhouse.

It’s not a sprawling attraction, and that’s part of the appeal. You get history without the marathon, context without the overload—and a rare chance to stand in a place where trade, power, and exploration once quietly intersected.