Located between Marques de Pombal and the Calouste Gulbenkian Foundation, this exclusive T4+1 duplex penthouse spans the top floors of the renovated AAA23 building a contemporary project that blends architectural identity with modern sophistication. Just steps from Eduardo VII Park, El Corte Ingles, and Sao Sebastiao metro station, this residence offers a truly unique lifestyle in the heart of Lisbon. The well-designed layout unfolds across two floors. On the 6th floor, an open-plan living and kitchen area of 38 sqm provides a welcoming space for entertaining, complemented by a 14 sqm suite with private 4 sqm bathroom, a 9 sqm office or additional bedroom, and a guest bathroom of 2.6 sqm. Upstairs, a refined 14 sqm mezzanine overlooks the living area, joined by a 12.9 sqm suite with a 2.6 sqm bathroom and the primary suite with 13.2 sqm and en-suite bathroom of 2.8 sqm. High-quality finishes include a SMEG-equipped kitchen, matte oak floating flooring, aluminum window frames with thermal break and double glazing, and Estremoz white marble in both the kitchen and bathrooms. The home features an advanced smart home system for climate, lighting and motorized blackout blinds, ducted air conditioning with room-by-room control VRF , and a solar-supported hot water system. One parking space is included. AAA23 stands in one of Lisbons most sought-after locations, offering easy access to the North-South Axis, A5 motorway Cascais , and Lisbon Airport, just 11 minutes away. Surrounded by shops, services, schools and transport, this is a rare opportunity to enjoy comfort, exclusivity, and a privileged address in Lisbon.