The MacSheehies built this stronghold sometime between 1460 and 1480, establishing themselves here after James, Earl of Desmond, granted them these lands around 1420. The castle’s main block measures nearly 14 metres by just over 9 metres, with walls a metre and a half thick rising from a battered base; a defensive design typical of Irish tower houses from this period.

The castle’s architecture tells a story of both military pragmatism and domestic comfort. The main tower originally contained three storeys, with the lowest two levels sitting beneath a protective vault. A square turret at the northeast corner houses a spiral staircase, its rooms also vaulted for additional strength. What makes Lisnacullia particularly interesting is its awkward internal layout; reaching the upper floors requires navigating a zig-zag passage to access the newel stair in the southeast wing, whilst a second staircase, ingeniously built over a squinch arch at the northern angle, provides access to the highest levels. The remnants of a polygonal bawn, roughly 30 metres across, once enclosed a courtyard to the southeast, complete with outbuildings and a defensive tower at its furthest corner.

The castle’s history mirrors the turbulent politics of medieval and early modern Ireland. After the MacSheehies’ tenure, it was confiscated following the 1579 Desmond Rebellion and granted to Thomas Caune, whose family held it until at least 1596. The fortress changed hands several times over the following century; Donogh O’Brien took possession in 1620, Sir Edward Fitzgerald held it by 1655, and it was eventually confirmed to the Browne family in 1668. By 1840, locals knew it as “Woodfort,” and whilst the west wall partially collapsed in the 1960s, destroying an upper fireplace, the castle remains an impressive survivor of Ireland’s castellated past, still standing adjacent to a working farmyard with a stream flowing nearby, just as it has for over five centuries.