This great stone castle was founded in the early 13th century and became the principal residence of the Kildare branch of the Geraldines. The Kildare FitzGeralds extended their land holdings and influence, emerging as one of the most powerful families in Ireland with Maynooth Castle being one of the largest and richest Earl's houses. As this site is managed by the OPW, school tour visits are permitted free of charge provided certain conditions are met. Please ring Maynooth Castle directly for information and for bookings.