Christ Cathedral (Spanish: Catedral de Cristo; Vietnamese: Nhà Thờ Chính Tòa Chúa Kitô), formerly and informally known as the Crystal Cathedral, is an American church building of the Roman Catholic Diocese of Orange, located in Garden Grove, California. The reflective glass building, by the firm of Philip Johnson/John Burgee Architects seats 2,248 people. The church was touted as "the largest glass building in the world" when it was completed in 1981. The building has one of the largest musical instruments in the world, the Hazel Wright Memorial Organ.