 The repaired building was consecrated by Pope Eugene III in 1147.In 1272 the crossing tower collapsed, destroying the whole of the upper church and severely damaging the subterranean one, and smashing some of the supporting columns of the rotunda.Then the abbot, Hugh of Arc, of a powerful Burgundian family, was able thanks to his contacts to mobilise enough support to begin the construction of a new Gothic abbey church in 1281.