Le UIA World Congress of Architects 2026 Barcelona is a unique international event for architectural dialogue, bringing together renowned architects, researchers, and leading figures from various disciplines. The Congress is convened by the International Union of Architects (UIA), a non-governmental organization uniting national associations of architects from over 100 countries and representing more than one million professionals worldwide. It is organized by the Higher Council of the Orders of Architects of Spain (CSCAE), a UIA member section, in collaboration with the Architects’ Association of Catalonia (COAC) in Barcelona, the host city.