Law Castle
It was built for Princess Mary , sister of King James III , as a wedding gift upon her marriage in 1467 to Thomas Boyd , Earl of Arran . 
<triplet> Princess Mary <subj> King James III <obj> sibling <subj> Thomas Boyd, Earl of Arran <obj> spouse <triplet> King James III <subj> Princess Mary <obj> sibling <triplet> Thomas Boyd, Earl of Arran <subj> Princess Mary <obj> spouse