Historical records from the mid-17th century tell us that John White and his mother, Lady Ellis Morres, owned these lands of Mylerstowne, where they described finding ‘a castle the walls onely standing’. The castle appears on Down Survey maps from the same period, and earlier documents from 1561 mention William fitz James Brennaghe of Milodeston, suggesting the site’s importance stretched back through several centuries of Irish history.

Today, only fragments of this once-imposing structure survive; the south wall stretches 9.5 metres and a portion of the west wall extends 5.8 metres, both constructed from roughly coursed limestone rubble nearly two metres thick. The remaining walls rise to second-floor level, though ivy now obscures much of the upper sections. Archaeological evidence reveals the castle’s original layout: the first floor was supported by wooden beams, whilst the second floor rested on a stone vault that sprang from the north and south walls, though this has long since collapsed, leaving only the springer stones. A large window embrasure can still be seen centrally placed in the south wall at first-floor level, its internal splay visible despite the window itself being broken out, and remnants of a garderobe chute are evident at the southern end of the west wall.

The castle has endured centuries of neglect and stone robbing; quoin stones have been removed from the southwest and southeast angles, whilst the inner face of the south wall shows evidence of quarrying at ground level. Modern intrusions include concrete slabs and building debris dumped against the inner walls from a dismantled shed, and there’s evidence of burning against the eastern end of the south wall’s interior. Despite this deterioration, the ruins offer valuable insights into medieval Irish tower house construction, from the vertical slots where timber frame supports were fixed during vault construction to the traces of a single-storey shed once built against the external wall. Local farm buildings may incorporate stones from the original castle, though none have been definitively identified.