Established in the early 13th century by the de Marisco family, this manorial settlement grew around a strategic river crossing point in the rolling countryside. The complex originally comprised a stone castle, a parish church with nave and chancel, and a medieval mill, forming the heart of what would become a significant feudal holding in the cantred of Ormond.

When William de Marisco died in 1284, an inquisition at Cashel revealed the true extent of his estate. His son John, then 29 years old, inherited six knights’ fees of land at Weyperous, valued at £26 13s 4d annually; a considerable sum for the time. These lands came with feudal obligations, requiring the provision of one knight for royal service when summoned and attendance at the Butler court at Nenagh Castle. The estate continued to evolve over the centuries, and by the 16th century, an inquisition following the death of James, the ninth Earl of Ormond, described the manor as containing ‘one castle, one hall, once one chapel with a thatched roof and two rooms covered with tiles’.

Today, visitors to Ballynaclogh can still trace the footprint of this medieval powerhouse. The castle site now appears as an earthen mound roughly 20.5 metres across, likely formed from the collapsed rubble of the original stone fortification. Heaps of masonry crown the irregular mound, whilst limestone rubble walls with a distinctive base batter still retain parts of the western side. A later 17th century house stands adjacent to what was once the long hall, offering layers of history in a single location. The site stands as a testament to the Norman colonisation of Ireland and the feudal system that shaped the medieval Irish landscape.