Complex sentence: Additionally, he served as the Founding Chairman of the Wallis Annenberg Center for the Performing Arts in Beverly Hills, California until February 2013, where the 500-seat Goldsmith Theater is named in his honor.
Split into simpler sentences: Additionally, he served as the Founding Chairman of the Wallis Annenberg Center for the Performing Arts in Beverly Hills, California until February 2013. Therein the 500-seat Goldsmith Theater is named in his honor.