Kerelaw Castle is said to have been held by the Lockharts from Richard de Morville, Constable of Scotland, as far back as 1191, after Stephen Lockhart or Loccard obtained a grant of land in Ayrshire. The castle and barony were eventually passed on to the Campbells of Loudoun and later to the Cunninghames (or Cunninghams/Cuninghames) of Kilmaurs. It was in the Cunninghame's possession in 1488 that the castle was sacked and burned by the 2nd Lord Montgomerie, during the well documented and long-term feud between these two prominent Ayrshire families.
Kerelaw was rebuilt sometime after 1488 and is reported to have contained a number of carved coats of arms of the Scottish nobility, taken from Kilwinning Abbey, Nine fishermen from Saltcoats were granted leases in 1545 in return for carrying the Earl's furniture to Finlayston on the Clyde every spring from the Creek of Saltcoats and bringing it back again in the autumn when the family returned to Kerelaw for the winter months. A half barrel of herrings was also to be furnished yearly to the Earl.
Kerelaw Castle is now a ruin, with three walls surviving in various states of decay. Gothic windows still adorn the southern wall, believed to have been inspired by those at Kilwinning Abbey.
References:Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).