A cathedral (Lat. cathedra, "seat") is a Christian church that contains the seat of a bishop. It is a religious building for worship, specifically of a denomination with an episcopal hierarchy, such as the Roman Catholic, Anglican, Orthodox and some Lutheran churches, which serves as a bishop's seat, and thus as the central church of a diocese.
The role of the cathedral is chiefly to serve God in the community, through its hierarchical and organisational position in the church structure. The plan of a cathedral generally takes the form of a cross which has both symbolic meaning and is functional in terms of church worship, allowing space for clergy, choir, chapels, processions a pipe organ and other activities and objects associated with cathedral tradition.
Many cathedral buildings are very famous for their architecture and have local and national significance, both artistically and historically. Many are listed among the UNESCO World Heritage Sites.
Cathedral Wikipedia Entry