Many years ago I had a tour of the interior of the castle and was told that I was not permitted to photograph because my camera looked professional and I would, therefore, need a permit in advance of the tour. Today I used an iPhone but I did not actually enter the building.

Maynooth Castle is a ruined 12th century castle in Maynooth, County Kildare, Ireland which stands at the entrance to the South Campus of Maynooth University. Constructed in the early 13th century, it became the primary residence of the Kildare Fitzmaurice and Fitzgerald family.