Priñs Kembre ha [[Roue ar Vrezhoned]] a zo bet graet anezhañ e dihelloù zo.
Anavet eo evel ''Yr Arglwydd Rhys'' (an aotrou Rhys) ha breur e oa d'ar briñsez [[Nest]].
|caption =Effigy of Rhys ap Gruffydd at [[St. Davids Cathedral]]
|spouse =Gwenllian ferch Madog
|issue =[[Gruffydd ap Rhys II]]<br />[[Maelgwn ap Rhys]]<br />[[Rhys Gryg]]<br />Hywel ap Rhys<br />Gwenllian ferch Rhys<br />Angharad ferch Rhys<br />and others
|royal house =[[House of Dinefwr]]
|father =[[Gruffydd ap Rhys]]
|mother =[[Gwenllian ferch Gruffydd]]
|date of birth =c. 1132
|date of death =28 April 1197
He usually used the title "Prince of [[Deheubarth]]" or "Prince of South Wales", but two documents have been preserved in which he uses the title "[[Prince of Wales]]" or "[[King of the Britons|Prince of the Welsh]]".<ref>In a charter concerning a grant to Chertsey Abbey he uses ''princeps Wall[ie]'' while a charter dated 1184 concerning Strata Florida Abbey uses ''Walliar[um] princeps''. See Pryce pp. 96–7, 168–9, 171–4</ref> Rhys was one of the most successful and powerful [[Wales|Welsh]] princes, and after the death of [[Owain Gwynedd]] of [[Kingdom of Gwynedd|Gwynedd]] in 1170 was the dominant power in Wales.
Rhys's grandfather, [[Rhys ap Tewdwr]], was king of Deheubarth, and was killed at [[Brecon]] in 1093 by [[Bernard de Neufmarche]]. Following his death, most of Deheubarth was taken over by the [[Normans]]. Rhys's father, [[Gruffydd ap Rhys]], was eventually able to become ruler of a small portion, and more territory was won back by Rhys's older brothers after Gruffydd's death. Rhys became ruler of Deheubarth in 1155. He was forced to submit to King [[Henry II of England]] in 1158. Henry invaded Deheubarth in 1163, stripped Rhys of all his lands and took him prisoner. A few weeks later he was released and given back a small part of his holdings. Rhys made an alliance with Owain Gwynedd and after the failure of another invasion of Wales by Henry in 1165 was able to win back most of his lands.▼
In 1171 Rhys made peace with King Henry and was confirmed in possession of his recent conquests as well as being named Justiciar of South Wales. He maintained good relations with King Henry until the latter's death in 1189. Following Henry's death Rhys revolted against [[Richard I of England|Richard I]] and attacked the Norman lordships surrounding his territory, capturing a number of castles. In his later years Rhys had trouble keeping control of his sons, particularly [[Maelgwn ap Rhys|Maelgwn]] and [[Gruffydd ap Rhys II|Gruffydd]], who maintained a feud with each other. Rhys launched his last campaign against the Normans in 1196 and captured a number of castles. The following year he died unexpectedly and was buried in [[St David's Cathedral]].