Belsay Castle is a 14th-century medieval castle situated at Belsay, Northumberland, England. It is a Scheduled Monument and a Grade I listed building. The main structure, a substantial three-storey rectangular pele tower with rounded turrets and battlements, was constructed about 1370, and was the home of the Middleton family. In 1614 Thomas Mi…Belsay Castle is a 14th-century medieval castle situated at Belsay, Northumberland, England. It is a Scheduled Monument and a Grade I listed building. The main structure, a substantial three-storey rectangular pele tower with rounded turrets and battlements, was constructed about 1370, and was the home of the Middleton family. In 1614 Thomas Middleton built a new manor house attached to the tower. A west wing was added in 1711 but was largely demolished in 1872 by Sir Arthur Middleton when the remainder of the house was considerably altered.