Giotto’s Campanile is a free-standing bell tower that is part of the complex of buildings that make up Florence Cathedral on the Piazza del Duomo in Florence. Standing adjacent the Basilica of Santa Maria del Fiore and the Baptistry of St. John, the tower is one of the showpieces of the Florentine Gothic architecture with its design by Giotto, its rich sculptural decorations and the polychrome marble encrustations.
This slender structure stands on a square plan with a side of 14.45 metres (47.41 ft). It attains a height of 84.7 metres (277.9 ft).
Source and more informations: Campanile di Giotto