Numerous studies have been devoted to Siena Cathedral and in particular to its sculptures, all of them masterworks of medieval, Renaissance and Baroque art. The masters who have worked here include Nicola and Giovanni Pisano, Donatello, Michelangelo, Beccafumi and Bernini, to mention only the most famous, along with countless other sculptors and stonemasons of every age. The most recent discoveries and critical studies have, however, demanded a reassessment of the Cathedral's sculpture, with attendant investigation and clarification. In that respect, this is a complete catalogue in topographical order of the sculptures that can still be admired on the outside of the Cathedral, providing a comprehensive gazetteer that is extremely easy to consult.