| Name: | Roscommon | CISP No: | RCMMN |
| Place: | Roscommon | Grid Ref: | M 8740 6380 (IR)
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| Parish: | Ballintober South | Stones: | 1 |
| County: | Roscommon (Ros Comáin) , Ireland | Saint(s): | none |
| Site Type: | ecclesiastical |
Petrie/1878, 10: `The first Abbey of Roscommon was founded in the year 742. The entries in the Annals respecting it are as follows: --
A.D. 742. Comman of Ross, who was Abbot of Clonmacnois, and eke a man full of the grace of God was he, died.
A.D. 774. Forbhasach, son of Maeltola, Abbot of Ros-Comain, died.
A.D. 788. The law of St. Comman was promulgated by Aeldobhair, ie. Abbot of Ross-Commain, and by Muirgheas throughout the three divisions of Connaught.
A.D. 795. Aeldobhar, Abbot of Ros-Commain, died.
A.D. 811. Joseph, scribe of Ros-Commain, died.
A.D. 813. Siadhail, Abbot and Bishop of Ros-Commain, died.
A.D. 828. Joseph son of Nechtan, Abbot of Ros-Commain, died.
A.D. 835. Ceallach, son of Forbhasach, Airchinnech of Ros-Commain, was slain.
A.D. 914. Martin, Abbot of Ros-Commain, died.
A.D. 928. Donnghal, Abbot of Ros-Commain, died.
A.D. 979. Murchadh, son of Riada, Abbot of Ross Chomain, and Prior of Cluain-mic-Nois, died.
A.D. 1050. The Cloictheach (bell-house) of Ros-Commain was burned by the men of Breifne.
A.D. 1135. Ros-Commain was plundered and burned, both houses and churches, by the Conmhaicni [of the county of Mayo].'