Complex sentence: The construction of Ravenscraig Castle under the order of King James II (reigned 1437-1460) was to built as a home for his wife, Mary of Gueldres by the mason Henry Merlion and the master carpenter Friar Andres Lesouris.
Split into simpler sentences: The construction of Ravenscraig Castle began under the order of King James II (reigned 1437-1460) as a home for his wife, Mary of Gueldres. The castle was built by the mason Henry Merlion and the master carpenter Friar Andres Lesouris.