Glywysing

Kingdom of Glywysing
Teyrnas Glywysing (Old Welsh)
5th century–c. 1055
(intermittently in union with Gwent/in Morgannwg)
Medieval kingdoms of Wales, showing Glywysing in the south
Medieval kingdoms of Wales, showing Glywysing in the south
CapitalCardiff
Common languagesOld Welsh
Religion
Celtic Christianity
GovernmentMonarchy
Historical eraMiddle Ages
• Formed after Roman withdrawal from Britain
Late 5th century
• Various unions with Gwent
6th century–c. 745
• Union in Morgannwg
(under Morgan Hen ab Owain)
942–974
• Union as part of Wales
(under Gruffydd ap Llywelyn, King of Wales)
1055–1063
• Union in Morgannwg
1063–1074
• Becomes Morgannwg
(under Caradog ap Gruffydd)
1075
Preceded by
Succeeded by
Roman Britain
Kingdom of Morgannwg
Kingdom of Morgannwg

Glywysing was, from the sub-Roman period to the Early Middle Ages, a petty kingdom in south-east Wales. Its people were descended from the Iron Age tribe of the Silures, and frequently in union with Gwent, merging to form Morgannwg.