The eastern side of this intersection marks the spot where this medieval fortification commanded its position, though today you’d be hard pressed to find any physical evidence of its existence. The site represents one of many lost castles that once dotted the Irish landscape, their stones and stories absorbed into the modern streetscape.

The castle’s transformation tells a familiar tale of Ireland’s changing fortunes. By around 1765, Robert Barry had converted the old fortress into a dwelling house, reimagining the military structure as a comfortable residence. This adaptation earned it the name ‘Castle House’, a moniker that acknowledged both its martial past and domestic present. Such conversions were common throughout Ireland as the need for defensive structures gave way to more peaceful times, and practical homeowners saw opportunity in the solid walls and prime locations of former strongholds.

While no visible trace remains of either the original castle or Castle House, the location continues to carry its history in local memory and historical records. The site serves as a reminder that beneath Dalkey’s modern streets lies centuries of layered history; from medieval defences to Georgian conversions, each era leaving its mark even when the physical structures have long since vanished. For those interested in Ireland’s castellated past, this invisible monument offers a chance to stand where walls once rose and imagine the lives that unfolded within them.