The Crystal Cathedral is a Protestant Christian church in the city of Garden Grove, in Orange County, California, United States. The prominent architect Philip Johnson designed the main sanctuary building, which was constructed using over 10,000 rectangular panes of glass. The sanctuary seats 2,736 people. The rectangular panes of glass are not bolted to the structure; instead they are glued to it using a silicone-based glue. This and other measures are intended to allow the building to withstand an earthquake of magnitude 8.0. The name "Crystal Cathedral" is merely an alliterative colloquialism and does not mean that the church is a cathedral in the sense of being a church where there is a bishop's official seat; the Reformed Church in America is governed by elders. Nor is the church made of crystal. The church is a Southern California architectural landmark. On October 18, 2010, the board of the Crystal Cathedral filed for bankruptcy in Santa Ana, California.