A bell tower is a tower that contains one or more bells, or that is designed to hold bells even if it has none. Such a tower commonly serves as part of a church, and will contain church bells, but there are also many secular bell towers, often part of a municipal building, an educational establishment, or a tower built specifically to house a carillon. Church bell towers often incorporate clocks, and secular towers usually do, as a public service.
The Italian term campanile (/ˌkæmpəˈniːliː/; Italian pronunciation: [kampaˈniːle]), deriving from the word campana meaning "bell", is synonymous with bell tower; though in English usage Campanile tends to be used to refer to a free standing bell tower. A bell tower may also in some traditions be called a belfry, though this term may also refer specifically to the substructure that houses the bells and the ringers rather than the complete tower.
The tallest free-standing bell tower in the world, approximately 110 m high, is the Joseph Chamberlain Memorial Clock Tower, located at the University of Birmingham, UK.
Bells are rung from a tower to enable them to be heard at a distance. Church bells can signify the time for worshippers to go to church for a communal service, and can be an indication of a time to pray, without worshippers coming to the church. They are also rung on special occasions such as a wedding, or a funeral service. In some religious traditions they are used within the liturgy of the church service to signify to people that a particular part of the service has been reached. .