Editing Llywelyn ab Iorwerth (section)

=== Death and the transfer of power ===
[[Image:LlywelynCoffin.png|thumb|left|Llywelyn's stone coffin is now in [[Llanrwst]] parish church.]]

Joan died in 1237 and Llywelyn appears to have suffered a paralytic stroke the same year.{{sfn|Stephenson|1984|p=xxii}} From this time on, his heir Dafydd took an increasing part in the rule of the kingdom. Dafydd deprived his half-brother Gruffudd of the lands given him by Llywelyn and later seized him and his eldest son [[Owain Goch ap Gruffudd|Owain]] and held them in [[Criccieth Castle]]. The chronicler of ''[[Brut y Tywysogion]]'' records that in 1240, "the lord Llywelyn ap Iorwerth, Prince of Wales, son of [[Owain Gwynedd]], a second [[Achilles]], died having taken on the habit of religion at Aberconwy, and was buried honourably."{{sfn|Williams|1860|p=198}}

Llywelyn died at the [[Cistercians]] abbey of [[Aberconwy Abbey|Aberconwy]], which he had founded and was buried there.<ref name=DWB/> This abbey was later moved to [[Maenan]], becoming the [[Maenan Abbey]], near [[Llanrwst]], and Llywelyn's stone coffin can now be seen in [[St Grwst's Church, Llanrwst]]. Among the poets who lamented his passing was Einion Wan:

{{blockquote|True lord of the land – how strange that today<br>He rules not o'er Gwynedd;<br>Lord of nought but the piled up stones of his tomb,<br>Of the seven-foot grave in which he lies.{{#tag:ref|Translated by Lloyd{{sfn|Lloyd|1911|p=693}}|group=ll}}}}

Dafydd succeeded Llywelyn as Prince of Gwynedd, but King Henry was not prepared to allow him to inherit his father's position in the remainder of Wales. Dafydd was forced to agree to a treaty greatly restricting his power and was also obliged to hand his half-brother Gruffudd over to the king, who now had the option of using him against Dafydd. Gruffudd was killed attempting to escape from the [[Tower of London]] in 1244. This left the field clear for Dafydd, but Dafydd himself died with illegitimate and underage issue in 1246 and was eventually succeeded by his nephew, Gruffudd's son, [[Llywelyn ap Gruffudd]].