The knowledge of there being a gatehouse has been around for at least the early 12th century when the constable around that time, a man named William Galrote, was said to have been murdered at the gate of the court of Swords. The ruins next to the gatehouse are known to many today as the Knights & Squires. Originally this was once a three-storey building or tower that has gone through several stages of rebuilding. In one corner a large 16th-century brick-lined oven can still be seen once you enter the courtyard grounds.