Hopton Castle is a medieval fortification located in Shropshire, England, halfway between Knighton and Craven Arms, with origins tracing to the 12th century. Originally constructed as a motte-and-bailey structure, it was later fortified in stone by Walter de Hopton during the Barons' War of the 1260s. The castle gained prominence during the English Civil War when it was held for Parliament—a rare royalist-opposing stronghold in the west. In 1644, the castle fell under siege by Sir Michael Woodhouse with approximately 500 troops; the subsequent massacre of thirty Roundhead defenders under Samuel More became a grim historical episode. A ruin since the early 18th century, Hopton Castle was partially restored between 2006 and 2011 and reopened to the public in 2011.