English: Arrow slot with integral gun muzzle hole, Raglan Castle Raglan Castle, in Monmouthshire, is the boyhood home of Henry Tudor, later King Henry VII. Although there had been a castle on this site since the twelfth century, the late medieval structure visible today dates mostly from the fifteenth. Although a defensive fortress, by the sixteenth century the castle had become the grand home of the Earls (later Marquesses) of Worcester.

When Civil War broke out in the 1640s, Henry Somerset, Marquess of Worcester, was a staunch supporter of King Charles. Even after most towns and castles in England and Wales had fallen to the Parliamentarians, Raglan held out for the King. After a siege lasting months, the Marquess was compelled to surrender the castle to to General Fairfax on 19 August 1646. Much of the castle was destroyed at this time: despite this, much of the hexagonal Great Tower and the lavish suites of apartments survive.

Formerly conserved and managed by the British government's Board of Works (later English Heritage), the site is now cared for and run by Cadw (the historic environment service of the Welsh Assembly Government). Raglan Castle is open to visitors throughout the year.