“Highly expressive” and “intensely personal” perfectly describe Frank Gehry’s design for the Guggenheim Museum Bilbao, which opened in 1997 and quickly became one of the most famous buildings in the world. With its swirling forms and its facade of titanium, glass, and limestone, Gehry’s Guggenheim dances gracefully between architecture and sculpture. Taken together, the Wright and Gehry museums have come to represent the unique character of the Guggenheim in the popular mind. This has led some observers to speak of a Guggenheim “brand” that is inextricably linked to architecture, not just art.