 Delimited by the 14th century wall circuit, built thanks to the economic and commercial power reached at the time, knew its maximum splendor in the following two centuries.Spiritual center of the city is Piazza del Duomo with the Cathedral of Santa Maria del Fiore, flanked by Giotto's Campanile and facing the Baptistry of Saint John with the 'Gates of Paradise' by Lorenzo Ghiberti.From here to the north there are the Palazzo Medici Riccardi by Michelozzo, the Basilica of Saint Lawrence by Filippo Brunelleschi, with the precious sacristies of Donatello and Michelangelo.