The castle was also the meeting place of Henry II of England and Rhys ap Gruffudd in 1171–1172, where they agreed a treaty of peace.

When Henry II of England died in 1189 the castle, along with St Clears and Llansteffan, were seized by Rhys ap Gruffudd of Deheubarth in the same year.

After this the rebellion petered out under the weight of greater English numbers; and by 1415, Owain Glyndŵr had disappeared, fading into myth.

In 1584, Queen Elizabeth I granted Laugharne to Sir John Perrott (rumoured to have been an illegitimate son of Henry VIII) who was responsible for converting the castle from a fortification into a Tudor mansion.

The author Richard Hughes leased Castle House in the 1930s and 1940s, and wrote his novel In Hazard (1938) working in the garden gazebo overlooking the river.

The two extra storeys and the circular stairway were probably erected in the late thirteenth century, and a new hall was built at this time against the south of the curtain wall.

In the sixteenth century, the castle was remodelled into a substantial Tudor mansion with a more comfortable accommodation block and with mock battlements added to the curtain walls.

[2] Excavation has shown the remains of the Tudor cobbled courtyard, the presence of a pitched stone kitchen floor and the ground plans of the building at the different periods of its existence.