Buffalo, New York, which was once a prosperous city, is home to several architectural masterpieces built in the late 19th century to the early 20th century, such as the Darwin D. Martin House by Frank Lloyd Wright, the Guaranty Building by Louis Sullivan, and Kleinhans Music Hall by Eliel and Eero Saarinen. While some important buildings, including the Larkin Building by Wright, were demolished, the preservation movement has been active for the past several years. Architecture is embraced as a treasure, but it can be a burden to the city at the same time.