The first
motte-and-bailey castle (ca.1093) was built a mile away from the present site, probably about the time of the founding of the town by
Roger de Montgomery, a
Norman baron. In 1110, King
Henry I of England took Cardigan from Prince
Owain ap Cadwgan as a punishment, and gave the Lordship of Cardigan and the castle to
Gilbert Fitz Richard. The forerunner of the present castle was built by Gilbert Lord of Clare after the former was destroyed. The castle was handed down to Gilbert's son,
Gilbert de Clare, 1st Earl of Pembroke in 1136. The same year,
Owain Gwynedd led the defeat of the Norman rulers in the town of Cardigan at the
Battle of Crug Mawr. The town was taken and burnt, though the castle was successfully defended by Normans commanded by
Robert fitz Martin. The castle was later recaptured by the Normans, and was held for
Earl Roger of Hertford. In 1166 it was captured by
Rhys ap Gruffydd, who rebuilt it in stone in 1171. In 1176 the
first recorded eisteddfod was held at the castle. His daughter, Barbara Wood, and her mother moved into Castle Green House but this slowly fell into disrepair and was allowed to decay further by the owner to the extent that the outer castle walls needed supporting. Miss Wood continued to occupy the castle for almost 60 years, despite attempts by the local authority to take over the castle in 1971 and Castle Green House being declared unfit for human habitation in 1984. ==21st century==