Located on Rua de São Mamede, in Lisbon’s Sé district, this duplex apartment is set in one of the city’s most iconic areas, ideal for those seeking to live in the historic center with greater tranquility. The property stands out for its layout over two levels and for the presence of a private 73 m² terrace. With 210 m² of gross private area, this duplex results from the combination of two apartments, fully renovated over the past two years. It features three suites, all with built-in wardrobes and private bathrooms, complemented by a fourth guest bathroom. On the first floor, the kitchen, living room and dining room are arranged in an open-plan layout, also including a pantry integrated into the kitchen. The upper floor offers an additional large room, allowing for different uses depending on the residents’ needs. The private 73 m² terrace incorporates a wall belonging to an ancient Roman structure, adding a unique heritage element to the property. The location ensures quick access to the city center, less than a 10-minute walk from Baixa-Chiado. The surroundings combine proximity to major historical landmarks with a quieter street, with reduced traffic and movement, suitable for those seeking a more discreet urban environment. Sé de Lisboa benefits from traditional commerce, a variety of services and pedestrian connections to several areas of the city, allowing residents to enjoy Lisbon’s historic life while maintaining a sense of serenity in a neighborhood marked by heritage and authenticity.