The Lisbon Architecture Triennale is a non-profit association whose mission is to research, foster and promote architectural thinking and practice. It holds a major forum every three years for the debate, discussion and dissemination of architecture across geographic and disciplinary boundaries.

The first Lisbon Architecture Triennale, Urban Voids took place in 2007 with a programme of international exhibitions, competitions and conferences drawing 52,000 visitors and participants. In 2010, its second edition Let’s Talk About Houses consolidated the Triennale’s presence in the circuit of events devoted to architecture with an estimated 154,000 attendees. With its third edition, Close, Closer, in 2013, the event reached its international recognition, receiving 162,000 visits.

The Triennale also organizes Intervalo, a programme which happens between each edition of the Triennale event, as well as Critical Distance Conferences, which bring to Lisbon some of the greatest figures of the international architecture scene. Additionally, the Triennale is also organizing Open House Lisboa and Open House Porto (together with Casa da Arquitectura), two events aimed to showcase the best architecture in these cities for one weekend each year.

The Lisbon Architecture Triennale was distinguished in all its editions (2007, 2010, 2013 and 2016) with the High Patronage of His Excellency the President of the Portuguese Republic.