St Catherine's Castle
Cornwall, England
St Catherine's Castle is a castle in Cornwall, England, first built in 1538. It is a scheduled monument. The nearest other castle is Restormel Castle, 6.6 mi away. It is cared for by English Heritage.

St Catherine's Castle at a glance
Built
1538
16th century
Type
Castle
Cared for by
English Heritage
Heritage status
scheduled monument
Grade II* listed building
About St Catherine's Castle
St Catherine's Castle (Cornish: Kastel S. Kattryn) is a Henrician castle in Cornwall, England, built by Thomas Treffry between approximately 1538 and 1540, in response to fears of an invasion of England by France and the Holy Roman Empire. The D-shaped, stone fortification, equipped with five gun-ports for cannon, overlooked the mouth of the River Fowey in Cornwall.
From the Wikipedia article on St Catherine's Castle, CC BY-SA 4.0.
St Catherine's Castle sits at 50.3282, -4.6445 in Cornwall. The closest other castles are Restormel Castle (6.6 mi), Lost Gardens of Heligan (8.0 mi) and Caerhays Castle (11 mi). Cornwall has 19 castles in all.