On the night of 10 June 1194 fire destroyed the Romanesque cathedral at Chartres. When the town's relic — a tunic believed to have been worn by the Virgin in childbirth (the *Sancta Camisia*) — was recovered intact from the crypt, an extraordinary pilgrimage fund flowed in for rebuilding.

The new cathedral was essentially complete by 1220 — an astonishing pace by medieval standards. That speed is what the building owes its coherence and structural consistency to. The pointed arch, ribbed vault, and flying buttress, first explored at Saint-Denis (1144), are used here together and at full scale. The result: the wall no longer needs to be load-bearing. Voids can stand; the window becomes less an architectural element than space itself.

Chartres' 176 stained-glass windows preserve their 13th-century originals to an unrivalled extent — no other cathedral in Europe retains so complete an original series. The intensity of the blue pigment became known in later centuries as 'Chartres blue', a glass not fully reproduced even by modern chemistry.

The labyrinth set into the nave floor (a 12.9-metre pattern), the sculptural programme of the western portals (the Royal Portal), and the rose windows of the north and south transepts are in themselves visual condensations of Gothic theology.

Chartres was inscribed on the UNESCO World Heritage List in 1979; Erwin Panofsky's famous thesis reads it as Scholastic philosophy made into stone.