In 1173, construction began on a free-standing campanile, or bell tower.
1173年,一座独立的钟楼开始建造。
英语百科
Bell tower
(重定向自Campanili)
A bell tower is a tower that contains one or more bells, or that is designed to hold bells, even if it has none. In the European tradition, such a tower most commonly serves as part of a church and contains church bells. Modern bell towers often contain carillons.