Outlined

Westropp (1906-7) recorded the following details about Dysert also known as Díseart Muirdeabhair; ' A tower [LI010-077----] 19 feet [5.8m] by 13 feet [4m], inside; walls, 4½ feet [1.4m] thick. It is four stories high, with a barrel stair of sixty-eight steps north-west beside the door, the latter protected by a "murder-hole". The lower and third story are vaulted, with a closet in the wall on the second floor. The details are of the later fifteenth century. There are slight traces of a side wing and bawn [LI010-077001-], all much injured (O.S.L., 8, p. 17). The Ordnance Survey Letters for the parish of Robertstown describes the castle remains as, 'on level ground, measures nineteen feet [5.8m] by thirteen feet [4m] inside. It has four stories, the arches of two of which still remains. The walls are about fifty feet [15m] high and four and a half feet [1.4m] in thickness'. No surface remains visible of bawn wall mentioned in the Ordnance Survey Letters. A river to SE of tower house may have been flanked by a bawn as there is a lot of stone lying on the ground. A low scarp (approx. L 35m) is visible from SE-S of the castle which may mark the outline of the levelled bawn wall. The 1840 ed. OS 6-inch map shows the castle standing in the centre of a sub-rectangular shaped field (approx. dims. 80m N-S x 60m E-W) which may represent the outline of the castle bawn. The fields around the castle have been levelled. Compiled by: Caimin O'Brien Date of upload: 15 May 2020 See attached ASI aerial photographs ASIAP – taken on 04/03/2006.

Dysert Castle, also known as Díseart Muirdeabhair, was likely built in the 13th or 14th century by a local Gaelic lord or Anglo-Norman family in the Dysert O’Dea region. It is remembered as a notable example of medieval tower house architecture in the area.