4-bedroom apartment with 148 sqm of private area, fully renovated in 2021 with premium features, home automation systems, A++ air conditioning, heat pump and original 1939 flooring restored, on Rua da Firmeza, Porto. This property stands out for its comprehensive renovation that combines historic charm with cutting-edge technology. The apartment features class A+ exotic wood windows with thermal and acoustic insulation, complete home automation system controllable via mobile app, individual A++ air conditioning in all rooms, 250-liter heat pump, kitchen with polished marble countertop and built-in appliances, two bathrooms with polished marmorite coating and OLI A++ suspended toilets, original 1939 varnished wooden flooring and completely new electrical system with LED lighting. Located on Rua da Firmeza, one of Porto's most authentic and increasingly valued areas, this property benefits from proximity to the UNESCO historic center, traditional commerce under revitalization and excellent connectivity to public transport. Relevant distances: Driving distance of 3 minutes to Trindade Metro Station, 5 minutes to Avenida dos Aliados, 8 minutes to Ponte Dom Luís I, 10 minutes to Hospital de Santo António, 15 minutes to Foz do Douro. Walking distance of 5 minutes to Teatro Nacional São João, 10 minutes to Livraria Lello, 12 minutes to Torre dos Clérigos. Francisco Sá Carneiro Airport 20 minutes driving distance.