A Christian church (or local church) is a group of people who share a faith or belief within a community. They usually meet in one particular location called a cathedral, temple, tabernacle, or simply a church building. A church group represents a certain doctrine and traditions. Many Christian churches that use the same name and share the same beliefs are a part of a denomination. A church that not part of a larger group is usually called nondenominational. There are estimated to be over 41,000 denominations worldwide. They may fall within three general groups: Orthodox, Catholic and Protestant Churches.