Killua Castle,[1] and the nearby Raleigh Obelisk, are situated near Clonmellon town, in north County Westmeath. The castle and the obelisk are separated by some 200 m to 300m, and belonged to the Chapman family more than two centuries ago, beginning with Captain Benjamin Chapman, patriarch of the Chapman Baronets of Killua Castle. From here, the Chapmans administered the surrounding farm lands of some 9,000 acres (36 km2) in the 18th century.