It has been suggested that an Anglo-Saxon fortification stood on this site prior to the arrival of the Normans. Roger de Montgomery built a timber castle here around 1070 which was eventually replaced by a stone building. It was besieged and fell to King Stephen 1138 and was occupied by Llewellyn ap Iorweth, Prince of Wales for a period in 1215. The castle was rebuilt and strengthened around 1300 by Edward I and the buildings that remain date from this period. It seems to have gone out of use as a fortress and eventually in the reign of Elizabeth I, custody was given to the town. It was captured during the Civil War by Parliamentary forces (1645) but was returned to Crown ownership again in 1660. In 1663 the castle was given to Sir Francis Newport and it remained in private hands until 1924, when the Shropshire Horticultural Society purchased the site and presented it to the town. The Hall building was used as the Council chamber until 1981. In 1985 it reopened as a museum dedicated to the history of Shropshire’s military regiments. In 1992, the museum was damaged by a terrorist bomb, which resulted in it being closed for three years.