In 1147 Savigny Abbey, with all its affiliated monasteries, was united to the Cistercian Order, and from that time onwards La Trappe was a Cistercian abbey, immediately subordinate to the abbot of Clairvaux.
Savigny Abbey was united to the Cistercian Order. This was with all its affiliated monasteries. This was in 1147. La Trappe was a Cistercian abbey subordinate to the abbot of Clairvaux. This was from that time onwards. This was immediately.