Thornton Castle dates back to the 14th century, the base of a round tower at the north-east of the building being the oldest surviving part. An L-plan tower was added in 1531, and a building connecting the two towers was built in 1662.
Thornton Castle is in the parish of Marykirk and the county of Kincardineshire.
Grid reference: NO 68754 71818
Lat / long: 56.83675818, -2.513052836
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