Rockefeller also bought sculptor George Gray Barnard's collection of medieval art in 1925. He added several artworks to the collection, which became a branch of the Metropolitan Museum of Art (Met) in 1926. Rockefeller retained Barnard as an advisor for the collection, and they collectively decided to add a museum for the collection at Fort Tryon Park, which they chose for its elevation, views, and accessible but isolated location. The Billings mansion, which was originally supposed to house the collection, was destroyed in a March 1926 fire that burned down everything except the walls. In June 1930, Rockefeller offered of the park to the city for a third time, though he reserved for the future museum. Rockefeller also offered to improve the grounds for $2 million, though the city would be responsible for improving utilities in the park. In his letter offering the park to the city, Rockefeller proposed to name the park after Fort Tryon, but in September 1930, historian Reginald Pelham Bolton said that Rockefeller actually preferred to have the park be named "Forest Hill Park". In early 1931, the city moved to accept Rockefeller's offer.