Frank Lloyd Wright designed Hollyhock House around 1920 for an oil heiress, who intended it to be part of an art and theater complex but became discouraged at construction and maintenance costs. Restored after a 1990s earthquake, it is a National Historic Landmark and has been grouped with other Wright buildings as a proposed UNESCO World Heritage site. It is open to the public as part of the Barnsdall Art Park.

barnsdall.org