Mont Cornillon Abbey (L'Abbaye du Mont-Cornillon in French) was a Premonstratensian monastery which occupied a site in Wallonia close to Liège, Belgium.
The abbey was founded by Albero I of Louvain, Bishop of Liège, in 1124, three years after Saint Norbert had formed the Premonstratensian Order.
Saint Juliana of Liège (born 1193; died 1258), whose name is connected with the institution of the feast of Corpus Christi on account of her visions, was a nun of this convent.
The first abbot of Mont Cornillon was Blessed Lucas, one of Saint Norbert's disciples, a learned and holy religious, some of whose writings have been published in the "Bibliotheca Magna Patrum", and also by Migne.
On the abbey's original site on Mont Cornillon the Little Sisters of the Poor have built an old people's home, and the former nunnery at the foot of the hill is now occupied by Carmelite nuns.