 It consisted of an ambulatory around the earlier chapel, surrounded by three large chapels with Romanesque barrel vault and groin vault ceilings, which still exist.On top of this structure he built the upper church, 108 metres long and 34 metres wide.The rebuilding proceeded in phases over the next century, culminating in 1145 in a display of public enthusiasm dubbed the "Cult of the Carts" – one of several such incidents recorded during the period.