In 1179, Bertram de Verdun, the lord of the manor of Croxden, endowed a site for a new abbey, and 12 monks arrived from the Savigniac Cistercian mother house of Aunay-sur-Odon in Normandy to build the new abbey over the next 50 years.
Neath Abbey was established in 1129 AD when Sir Richard de Granville, one of the Twelve Knights of Glamorgan, gave 8,000 acres (32 km²) of his estate in Glamorgan, Wales to Savigniac monks from western Normandy.