Since 2012, Open House Lisbon has been organised by the Lisbon Architecture Triennale, a non-profit organisation whose mission is to examine, foster and promote architectural thinking and practice. The festival offers the wider public free access to the city’s architecture through guided tours, urban walks and sound walks. With a wide variety of spaces, the ‘Junior’ and ‘Plus’ programmes, and accessible tours, visitors can choose what appeals most to their curiosity, interest and convenience.