The showcase of the Italian Renaissance, Florence can at times seem like one giant art museum. The Duomo, the Cathedral of Santa Maria del Fiore, is a landmark of world architecture, topped by its gravity-defying massive dome. Together with its marble-inlaid bell tower by Giotto and its octagonal Baptistery with its incomparable bronze doors by Ghiberti, this is one of the world’s finest ensembles of Renaissance art.