Frank Gehry is known as a deconstructivist architect. His early works in Los Angeles explored non-traditional forms and materials. A turning point was the Santa Monica Place mall, where he designed the interior first before constructing the exterior as a "huge sign." His later Lewis Building used digital tools to evolve radically between 1997-2000, incorporating traces of his past projects. Some of Gehry's most famous buildings include the Guggenheim Museum in Bilbao and the Walt Disney Concert Hall in Los Angeles.