It consists of curved and twisted shapes, coated limestone, glass curtains and titanium plates. The Guggenheim Museum Bilbao (Vizcaya, Basque Country), designed by Frank O. Gehry, has a total area of ??24,000 m², of which 10,540 m² are reserved for exhibitions of Contemporary Art, divided into 19 galleries. Since 2007 it is considered one of the 12 Treasures of Spain.