Castello dei Conti Guidi was built in the 13th century by Count Simone da Battifolle, head of the Guidi family. Inside, there's a fairy-tale courtyard, a handsome staircase, a library full of medieval manuscripts and chapel with frescoes by Taddeo Gaddi. The scene of Herod's Feast shows Salome apparently clicking her fingers as she dances, accompanied by a lute player, while John the Baptist's headless corpse lies slumped in the corner.