Duomo di Firenze, where Savonorola preached, had the world’s largest cathedral dome at the time of the Renaissance.
Palazzo Vecchio, where Soderini lived and Machiavelli worked, had the Hall of the Five Hundred added in 1494 for democratic assemblies.
San Marco Monastery, where Savonarola established his reputation as being able to speak directly with god.
Palazzo Medici Riccardi, the Medici palace, was simple on the outside but lavish on the inside so the Medicis would not appear extravagant.