This motte and bailey castle, likely constructed in the late 12th or early 13th century, represents one of the earliest forms of medieval fortification introduced to Ireland following the Anglo-Norman invasion. The motte, a steep artificial mound of earth, would have originally supported a wooden tower or keep at its summit, providing both a defensive stronghold and a symbol of Norman authority over the surrounding landscape.

The castle's strategic position near the River Nore allowed its builders to control an important crossing point and monitor movement through this part of south Leinster. Like many motte and bailey castles across Ireland, Owning was probably built quickly using local labour, serving as an immediate military foothold whilst more permanent stone fortifications were planned elsewhere. The adjacent bailey, a lower enclosed courtyard, would have contained workshops, stables, and accommodation for the garrison; though centuries of agricultural use have softened its original defensive earthworks.

Today, visitors to Owning can still appreciate the impressive scale of the motte, which rises dramatically from the surrounding fields despite eight centuries of erosion and neglect. Archaeological surveys suggest the site may have been abandoned by the 14th century, possibly due to shifting political boundaries or the construction of more substantial stone castles nearby. The earthwork remains offer a tangible connection to the tumultuous period when Norman adventurers were carving out new lordships across Ireland, forever changing the island's political and cultural landscape.