Third Phase: Construction

Third Phase, c.1230-40: Robert de Luzarches and Thomas de Cormont

The date of Robert’s death is unknown, but the seamlessness of work on the nave suggests that Thomas had already been working with him. That the southern triforium was completed before the north is indicated by the chamfered edges of the relieving arches on this side as well as the more slender diameter of the triforium shafts.