The Bilbao Fine Arts Museum has reopened after more than four years of construction, with an official ceremony held on October 5 and public access resuming on October 6. The expansion centers on Agravitas, a new structure designed by Foster + Partners in collaboration with local architect Luis María Uriarte, which spans 55 metres above the museum's existing buildings like a bridge, leaving the historic fabric beneath it largely untouched. The extension adds around 6,000 square metres, increasing the museum's total area by roughly 60 per cent. It includes 2,300 square metres of new exhibition space across two levels, with the 1,300-square-metre column-free BBK Museoa gallery for temporary exhibitions occupying the upper level. The project also provides new facilities for education programmes and workshops, offices, and public sculpture terraces overlooking the city. Construction cost is reported at about €45–46 million, and the design incorporates green low-carbon steel and rooftop photovoltaic panels sized to cover half of the building's thermal demand. For the first time in many decades, the museum's original 1940s entrance facing the city square has been reopened, forming a new enclosed plaza intended as the social heart of the complex. The project reconnects the museum's architectural layers — the 1945 building, its 1970s extension and an intervention from the early 2000s — into one unified sequence of spaces. The inaugural display, The Search for the Beginning: A Tribute to Plácido Arango, draws on the collection of the late patron Plácido Arango, bringing together more than a hundred Old and Modern Masters, from Goya to Frida Kahlo, in an evolving presentation designed to run through 2030, accompanied by a dedicated research chair. Admission is free during the opening week, from October 6 to 13. The reopening was also marked by major gifts: the Arango family and Patricia Phelps de Cisneros lent and donated key works, while Norman and Elena Foster presented Anselm Kiefer's Book Stack (2007) and two sculptures by Anthony Caro on permanent loan.