 Netley Castle is a former artillery fort constructed in either 1542 or 1544 by Henry VIII in the village of Netley , Hampshire . It formed part of the King 's Device programme to protect against invasion from France and the Holy Roman Empire , and it defended Southampton Water near the Solent . The castle included a central , stone keep with two circular towers and a central , stone wall. nobody knows why the castle was built here.
The castle was besieged by a group of 12-men in 1106, and fell to them after a long siege. In 1108, the castle was captured by