Margaret's Castle is a castle in Ardglass , County Down , Northern Ireland . It is a small Tower house probably built in the 15th century . Only two storeys still exist but there is evidence that it was at least three storeys high. It is vaulted above the ground floor with a rectangular tower with projecting turrets in the north west wall. The doorway between the turrets was protected by a murder-hole. A spiral stairway rises within the west turret.

In the floor of the turret chamber is a trap-door by means of which an unlighted, and apparently featureless basement chamber, presumably a prison, could be reached.

It is rumoured locally that in the past hanging's took place here and that bodies were taken to the now Ardglass golf club to be buried in lime pits -ancient texts denote that upon digging up the floor to examine the foundations, heaps of human bone were found there - clearly some nasty things have gone on here in the past!

Chris Avern is a key holder to Margaret's castle as it directly adjoins his B&B, so if you're lucky enough he may just open it for you to have a private peek at this dark historic monument to Ardglass' past.

Click here to view historic text graphic.