In 1997, Fred Seibert left Hanna-Barbera to found his studio. In 1998, Hanna-Barbera moved to the same building as Warner Bros. Animation; the use of the Hanna-Barbera name for new productions ended with William Hanna's death in 2001. Hanna and Barbera continued to work as Time Warner employees and consultants until their respective deaths in 2001 and 2006; the name is still used for productions based on properties created during the Hanna-Barbera era. Cartoon Network Studios now handles most original animation for the network.