Solar da Marquesa de Santos (Museu da Cidade de São Paulo)

Solar da Marquesa de Santos is a colonial-era townhouse in the Sé district, built up over the 18th and 19th centuries around an original core dating to the 1700s, making it one of the few residential buildings from São Paulo's colonial period still standing. It takes its name from Domitila de Castro do Canto e Melo, the Marquesa de Santos, who lived there and was the well-known mistress of Emperor Dom Pedro I in the early 19th century. The house has thick rammed-earth (taipa de pilão) walls typical of colonial Paulista construction, a U-shaped floor plan around an inner courtyard, and a facade that reflects successive renovations as the building passed through different owners and uses. It now operates as the Museu da Cidade de São Paulo, with rooms arranged to trace the city's growth from a modest colonial settlement into an industrial and financial metropolis, using period furniture, maps, photographs, and decorative objects. The museum's rotating exhibitions focus on urban history topics such as the coffee economy, immigration waves, and the transformation of the historic center, using the house itself, one of the last surviving domestic structures of its era in the district, as a physical anchor for that narrative.