Criccieth Castle is located on the headland between two beaches overlooking Tremadog Bay, in Criccieth, Gwynedd, North Wales.
The castle was built by Llywelyn the Great in 1230. He completed the inner ward, copying designs from English castles with a twin D-shaped gateway and portcullis. In the 1260's, the outer ward was added by Llywelyn ap Gruffudd.
The castle was taken by the English in 1283, under the command of Edward I. James of St George added another two storey tower and curtain wall, called the Engine Tower, was thought to have been the foundation for a siege engine.
In 1294, the castle was attacked and put under siege by Madoc ap Llywelyn in the Welsh uprising. This failed when the castle was resupplied in the spring of 1295.
The castle was later used as a prison, until 1404 when the castle was captured during the rebellion of Owain Glyndwr, who then set the castle alight.
Criccieth Castle is now maintained by Cadw.