The Tower of Palazzo Vecchio with the crenelated Chemin de Ronde, 95-metre high, overlooks the city and is one of its distinctive symbols and reference points. It belongs to the first hub of the building erected between 1299 and the early 14th century, likely designed by Arnolfo di Cambio. A stone stairway of 223 steps is located inside the Tower, which leads to the last crenelated lookout storey with a spectacular view on the city. A small cell called Alberghetto is found along the path where Cosimo il Vecchio was imprisoned in 1433 (before being exiled from Florence for one year for being accused to have plotted against the republic) and Girolamo Savonarola in 1498 (while waiting to be executed as heretic in Piazza della Signoria).