Portland Castle is one of the Device Forts, also known as Henrician Castles, built in 1539 by Henry VIII on the Isle of Portland to guard the natural Portland anchorage known as the Portland Roads. The castle lies in the far north of the island, in the village now called Castletown, near Fortuneswell. The castle is under the care of English Heritage. Portland Castle has a low profile offering less of a target, with a traditional rounded wall facing the sea, designed to deflect incoming ordnance. The land side was moated. Portland castle was armed for the last time during the Napoleonic Wars.