An underground room or vault beneath a church used as a burial place or to keep relics. In Chartres Cathedral, the Saint-Lubin Crypt, constructed in the ninth century, is buried deep beneath the choir. The second and much larger crypt, the Saint Fulbert Crypt, was built between 1020 and 1024. Its galleries extend beneath the aisles and the chevet of the present cathedral. This is one of the largest ancient cathedral crypts in France today.
