The formidable Castello, near Santa Maria delle Carceri, is an impressive sight. The (Sicilian) Holy Roman Emperor Frederick II (1194–1250) built the seat of his authority in Tuscany in this somewhat unlikely spot. Frederick's castles were designed to echo imperial Rome, and the many columns, lions, and porticoes testify to his ambition. This is the only castle he built outside of Sicily and Puglia in southern Italy.
Piazza Santa Maria delle Carceri, Prato, 59100, Italy