[4] Mungret was an early monastic site, founded before AD 551 by Saint Nessan (Neasán) the Deacon.

[5] In 908, Cormac mac Cuilennáin, King of Munster, gifted the abbey three ounces of gold and a satin chasuble.

1179 the then king of Munster, Domnall Mór Ua Briain, granted the monastery to Brictius, Bishop of Limerick.

There is a lintelled doorway with inclined jambs leading into the nave, which is the oldest part of the church.

[12] Built around the 12th century, it is rectangular with high gables, a lintelled west doorway and a small round-headed east window.