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Bilbao Fine Arts Museum completes Foster + Partners expansion

New Agravitas extension adds galleries and public spaces above historic buildings

Modern glass building with overhanging floors and diagonal supports, surrounded by trees and people.

Bilbao Fine Arts Museum reopens with Foster + Partners’ Agravitas extension spanning its historic buildings

Foster + Partners

Foster + Partners has completed the expansion and remodelling of Spain’s Bilbao Fine Arts Museum, in collaboration with Bilbao architect Luis María Uriarte.

The new Agravitas extension forms a 55-metre bridge above the museum’s existing buildings, increasing its area by 60 per cent while leaving the 1945 and 1970s buildings visible below.


A ceremony marking the reopening was held on Monday, 5 October, with the museum reopening to the public on 6 October.

Sunlit atrium with a large window, sculpture, and person walking. Agravitas adds new exhibition space to Bilbao Fine Arts Museum while preserving its 1945 and 1970s buildingsFoster + Partners

Norman Foster, founder and executive chairman of Foster + Partners, said: "In the great tradition of Bilbao, a city with a rich industrial history and an outstanding ability to reinvent itself, this project is about bridging the past, present, and the future.

"The flexible new building looks ahead to the future and responds to the ever-changing form of contemporary art, while remaining respectful of the site’s storied history."

He added: "Working in collaboration with local architect Luis María Uriarte and the museum teams, the design reinforces the museum’s role as one of the city’s major civic attractions, with enhanced permeability, expanded gallery spaces, and a new social heart for the museum."

Modern museum exterior with brick facade and large glass extension, people walking nearby. Bilbao Fine Arts Museum’s new Agravitas extension adds exhibition space, galleries and public areas above the historic buildingsFoster + Partners

Agravitas has added 2,300 square metres of new exhibition space across two levels, with BBK Museoa, a 1,300-square-metre column-free gallery for temporary exhibitions, occupying the upper level.

The extension also includes facilities for education programmes and workshops, offices and public sculpture terraces overlooking the city, Plaza Euskadi and Doña Casilda de Iturrizar park.

The project, designed in collaboration with the late Spanish engineer Julio Martinez Calzón, also restores the museum’s original main entrance and improves connections between the 1945 building, the 1970s extension and the early 2000s addition.

Modern museum lobby with large sculpture, people observing. Foster + Partners completes Bilbao Fine Arts Museum expansion, adding galleries above the museum’s existing architectureFoster + Partners

Foster said: "This has been a completely unified and progressive collaboration between the city, the regional government, and those generously supporting the project.

"I would like to pay tribute to the total dedication and commitment of the museum director, Miguel Zugaza, and the consultant team led by Taba Rasti and Pablo Urango Lillo from our Madrid studio."