Santa Caterina Market by Enric Miralles. "The Santa Caterina market roof is an infinite wavy carpet of colored hexagonal tiles that silently floats over the urban landscape of Barcelona Ciutat Vella district.
Spanish tile for the roof -- The restoration of Santa Caterina Market, Barcelona, by Enric Miralles and Benedetta Tagliabue - 2004 Architecture prize. Photo courtesy of ASCER.