Orvieto's famed St Patrick's Well has got onto UNESCO's list of water museums. The spectacular feat of engineering by Antonio da Sangallo the Younger has been added to the Global Network of Water Museums (WAMU-Net), which includes over 70 museums and institutions in 30 countries.

The 53-metre deep well was built by Florentine Sangallo between 1527 and 1537, at the behest of Pope Clement VII who had taken refuge at Orvieto during the sack of Rome in 1527 by the Holy Roman Emperor Charles V, and feared that the city's water supply would be insufficient in the event of a siege. The well was completed in 1537 during the papacy of Pope Paul III.