History

The cathedral’s origin is tied directly to the Miracle of Bolsena: in 1263, a German priest on pilgrimage to Rome, doubting the doctrine of transubstantiation, is recorded to have seen a consecrated host bleed onto the altar cloth (corporal) during Mass at Bolsena, a town near Orvieto. Pope Urban IV, then resident in Orvieto, had the blood-stained corporal brought to the city, and the relic’s arrival is understood to have prompted Pope Nicholas IV’s decision, in 1290, to commission a cathedral grand enough to house it and to serve Orvieto’s status as a favoured papal residence during a period when several popes withdrew from a politically unstable Rome.

Construction proceeded through multiple building campaigns and architects over more than three centuries; Lorenzo Maitani’s appointment in 1310 marked the project’s decisive phase, both structurally (correcting problems with the building’s stability) and artistically, giving the lower facade its four great marble pilasters carved in relief with biblical narrative, framing the central rose window. The mosaic upper register was reworked repeatedly in subsequent centuries, meaning much of what glitters on the facade today reflects post-medieval restoration and replacement rather than 14th-century originals, a detail the cathedral’s own conservation documentation addresses directly. Inside, the Cappella di San Brizio’s fresco cycle was interrupted for decades after Fra Angelico’s initial 1447 campaign before Luca Signorelli resumed and completed it between 1499 and 1504, producing a Last Judgment whose anatomical intensity and dramatic composition are documented as a direct point of reference Michelangelo consulted before beginning the Sistine Chapel ceiling.