The rebuilding of Montgomery Castle in stone was commenced in the late summer of 1223 on the 16th birthday of
Henry III of England, a mile to the south-east of the original site. Its architect was
Hubert de Burgh, who also rebuilt
Skenfrith Castle,
Grosmont Castle and
White Castle in the
Welsh Marches. From 1223 until 1228 masons worked solidly building the entire inner ward, or donjon as it was then known, on a great rock above the later town of Montgomery. This work consisted of the
gatehouse, two D-shaped towers and the apartments which crowded around the
curtain wall of the inner ward. After an unsuccessful attack by Prince
Llywelyn ab Iorwerth in 1228, the middle and outer wards were added; another attack in 1233 resulted in damage to the well tower, which had to be subsequently repaired and re-roofed. Montgomery was granted a
Royal Charter in 1227, making it the oldest
borough in Wales, and in 1267 hosted negotiations for the
Treaty of Montgomery, where
Henry III granted
Llywelyn ap Gruffudd the title of
Prince of Wales. In December 1282, the castle garrison formed part of the army that defeated and killed Llywelyn at the
Battle of Orewin Bridge. == Owain Glyndŵr ==