Margam Abbey was a
Cistercian monastery, located near the present-day town of
Port Talbot. It was founded in
1157. Although
dissolved by King
Henry VIII of England, the abbey church was later restored and is today in use as a
parish church. The ruins of other abbey buildings, including the twelve-sided
chapter house[?], dating from the
13th century, stand within a 840-acre country park, close to
Margam Castle[?]. On a hill overlooking the abbey stand the ruins of an outlying monastery building, Capel Mair ar y Bryn ("the chapel of St Mary on the hill").