Bolsena is named "the city of the Eucharistic miracle"[4] from which the solemnity of Corpus Domini had been extended to the whole Roman Catholic Church.

Funerary objects from these tombs are now located in Italy and abroad, including a fine collection in the British Museum.

[7] Bolsena is known for a miracle said to have occurred in the Basilica of Santa Cristina in 1263, when a Bohemian priest, in doubt about the doctrine of Transubstantiation, reported bleeding from the host he had consecrated at Mass.

The Orvieto Cathedral was eventually built to commemorate the miracle and house the Corporal of Bolsena in a reliquary made by Sienese goldsmith Ugolino di Vieri in 1337–1338.

The United States Navy established a naval air station on 21 February 1918 to operate seaplanes during World War I.