Saint Patrick's Well is the second most important monument in the town of Orvieto. It was dug in the sixteenth century at the request of Pope Clement VII, who sought refuge in Orvieto during the sack of Rome in 1527, in order to ensure the provision of water to its citizens all year round. The well is distinguished by an exceptional location overlooking the entire valley, and is located near the Etruscan temple of Belvedere and the great castle that is used today as the gardens of the city.