The castle declined in importance thereafter, but was attacked in March 1405 by Welsh forces led by Rhys Gethin and including Gruffudd, son of Owain Glyndŵr.
They were defeated by Prince Henry of Monmouth, later to become King Henry V or possibly John Talbot, 1st Earl of Shrewsbury.
Owain Glyndŵr | Owain Gwynedd | Owain Lawgoch | Owain | Alys ferch Owain Glyndŵr | Owain Goch ap Gruffydd | Owain Brown | Maredudd ab Owain | Rhun ab Owain Gwynedd | Owain Phyfe | Owain Glyndŵr (Owen Glendower) | Owain ap Hywel Dda | Maredudd ap Cynan ab Owain Gwynedd | Maelgwn ab Owain Gwynedd | Llywelyn the Elder ap Maredudd ap Cynan ab Owain Gwynedd | Hywel ab Owain Gwynedd | Gutun Owain | Gruffudd Hiraethog | Gruffudd Fychan II | Gruffudd ap Cynan | Gruffudd ab Owain Glyndŵr | Glyndwr Williams | Glyndŵr Rising | Glyndwr Michael | David Glyndwr Tudor Williams | Dafydd ab Owain Gwynedd |