Editing Glasnevin (section)

===Middle Ages===
A settlement grew up around the monastery, which survived until the Viking invasions in the eighth century. After raids on monasteries at [[Glendalough]] and [[Clondalkin]], the monasteries at Glasnevin and [[Finglas]] were attacked and destroyed.

By 822 Glasnevin, along with [[Grangegorman]] and Clonken or Clonkene (now known as [[Deansgrange]]),<ref>{{cite journal | author = Mac Giolla Phadraig, Brian| title = 14th century life in a Dublin Monastery| journal = Dublin Historical Record| issue = 1 | volume = 3| date = September 1938| pages = 69–72}}</ref> had become parts of the grange (farm) of [[Christ Church Cathedral, Dublin|Christ Church Cathedral]] and it seems to have maintained this connection up to the time of the [[English Reformation|Reformation]].

The [[Battle of Clontarf]] was fought on the banks of the [[River Tolka]] in 1014 (a field called the ''bloody acre'' is supposed to be part of the site). The Irish defeated the Danes in a battle, in which 7,000 Danes and 4,000 Irish died.

The 12th century saw the [[Normans]] (who had conquered England and [[Wales]] in the eleventh century) invade Ireland. As local rulers continued fighting amongst themselves the Norman King of England [[Henry II of England|Henry II]] was invited to intervene. He arrived in 1171, took control of much land, and then parcelled it out amongst his supporters. Glasnevin ended up under the jurisdiction of Finglas Abbey. Later, [[Laurence O'Toole]], Archbishop of Dublin, took responsibility for Glasnevin and it became the property of the Priory of the Most Holy Trinity (Christ Church Cathedral).

In 1240 a church and tower were reconstructed on the site of the Church of St. Mobhi in the monastery. The returns of the church for 1326 stated that 28 tenants resided in Glasnevin. The church was enlarged in 1346, along with a small hall known as the Manor Hall.