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Trienal de Arquitectura de Lisboa


How it works

Open House is an international event with more than 35 participant cities in the world.

During one weekend, you can discover inside out and up close the best architecture in Lisbon through free guided tours with no booking required.

Visits are on a first come first served basis to allow access to the largest number of people and facilitate the entrance flow. A few spaces require booking: those are duly marked on the itinerary, and we will let you know how to proceed concerning reservations closer to the date of the event, which is done exclusively online.

We have three visit formats:

  • Visit by Volunteer — get to know the space in detail through an accompanied visit made by our team of volunteers present at the location
  • Visit by Expert — a guided tour made by the author of the architectural project himself or by an invited specialist
  • Open visit — with no monitoring, within the designated timetable


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. We also organize the Critical Distance conferences in the CCB main auditorium, several events at our headquarters, the Sinel de Cordes Palace, which also houses a Creative Cluster.

A concept originally created in 1992 by Victoria Thornton, Open House Lisboa is part of the large family Open House Worldwide. Since 2012, the Lisbon Triennale organizes OH Lisboa, and since 2015, in partnership with EGEAC. In 2015 and 2016, we also launched Open House Porto, in collaboration with Casa da Arquitectura.

Aimed at the general public, OH Lisboa has as objectives and main principles:

  • to bring citizens closer to the architecture of their city
  • to open the doors of spaces normally closed to the public
  • to organize free visits that involve authors or specialists of different areas
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