The castle’s centrepiece is a well-preserved rectangular tower house rising four storeys, though it’s been considerably altered over time with a later building attached to its eastern side. The tower likely dates to a period of reconstruction following its destruction by Elizabethan forces in 1595, making it a tangible reminder of Ireland’s turbulent relationship with English authority during the Tudor period.

The castle’s defensive bawn wall originally formed a protective enclosure measuring approximately 13 metres east to west and 44 metres north to south. This wall followed a complex route, beginning at the tower’s northwest corner, running north before turning east, then south, west, and finally north again to meet the tower at its southwest corner. Three of the original flanking towers remain intact, complete with their wall walks that once allowed defenders to patrol the perimeter. These surviving elements offer a clear picture of how such fortifications operated in their heyday.

Later modifications tell their own story of changing times and needs. The southwest angle of the bawn saw significant alterations during the 18th century, when a square flanking tower and outhouses were inserted into the medieval structure. These additions reflect the castle’s evolution from a purely defensive stronghold to a more comfortable residence, as the need for military fortification gave way to domestic considerations. Today, Cloghan Castle stands as a multi-layered monument to Irish history, its stones bearing witness to centuries of conflict, survival, and adaptation in the heart of the Irish midlands.