This is an early thirteenth century castle in the town of Maynooth (Maigh Nuad) in County Kildare in Leinster. It was home to the Fitzgerald family until it fell to English forces after the 'Silken Thomas' rebellion, and the entire defensive garrison was killed in 1535. Silken Thomas refers to Thomas Fitzgerald 10th Earl of Kildare who was executed in London in 1537.
The castle is located in Maynooth village north of the M4 about thirty kilometres west from Dublin. Further travel information and opening times can be found on Discover Ireland.