The facade of this former hospital, sparkling after recent renovation works, stuns with its 16th-century polychrome terracotta frieze by Giovanni della Robbia. It depicts the Sette Opere di Misericordia (Seven Works of Mercy), and the five medallions represent the Virtù Teologali (Theological Virtues). The 13th-century hospital building cannot be visited, but you can delve into its underground belly of passageways and subterranean rivers decorated with old surgical tools, scalpels and all sorts with a one-hour Pistoia Sotteranea guided tour.
