Valle Crucis was truly Welsh from the moment it was founded in 1201 by Prince Madog ap Gruffydd and the ‘white monks’ of the Cistercian order.
Abaty cwbl Gymreig oedd Abaty Glyn y Groes o’r foment y cafodd ei sylfaenu ym 1201 gan y Tywysog Madog ap Gruffydd a ‘mynachod gwynion’ yr urdd Sistersaidd.