King Mesgegra's Mound is a motte and ancient Irish royal site located in Clane, County Kildare, Ireland.

[1] King Mesgegra's Mound is located south of Clane, 160 metres (540 ft) northwest of a fording point on the River Liffey.

Conall beheaded Mesgegra at the bullaun stone and placed his head in the hollow.

[2][3] This story is recounted in Tallaind Etair ("The Siege of Howth") in the 12th-century Book of Leinster.

[4] The mound was later built on in the 12th century by the Normans who took control of Clane, probably by Richard de Hereford.