In 1990, the Wright building was closed to the public to enable the expansion and a major interior restoration, which was overseen by the firm. The restoration opened the entire Wright building to the public for the first time, converting spaces that had been used for storage and offices into galleries. The restored and expanded Solomon R. Guggenheim Museum reopened in 1992, and the project became one of the firm's most celebrated and critically acclaimed works. It contains 4,750 square meters of new and renovated gallery space, 130 square meters of new office space, a restored restaurant, and retrofitted support and storage spaces.