The Leaning Tower of Pisa or simply the Tower of Pisa (Torre di Pisa) is the campanile

Campanile

Campanile is an Italian word meaning "bell tower" . The term applies to bell towers which are either part of a larger building or free-standing, although in American English, the latter meaning has become prevalent.The most famous campanile is probably the Leaning Tower of Pisa...

, or freestanding bell tower, of the cathedral

Cathedral

A cathedral is a Christian church that contains the seat of a bishop...

 of the Italian city of Pisa

Pisa

Pisa is a city in Tuscany, Central Italy, on the right bank of the mouth of the River Arno on the Tyrrhenian Sea. It is the capital city of the Province of Pisa...

. It is situated behind the Cathedral and is the third oldest structure in Pisa's Cathedral Square (Piazza del Duomo) after the Cathedral and the Baptistry.

The height of the tower is 55.86 m (183.27 ft) from the ground on the low side and 56.70 m (186.02 ft) on the high side.