Powys Fadog

Principality of Powys Fadog
Tywysogaeth Powys Fadog
1160–1277
Banner of Powys Fadog, known as the Black Lion of Powys
Coat of Arms of Powys Fadog
Powys as divided in 1190.
CapitalDinas Brân and Glyndyfrdwy
Common languagesWelsh
GovernmentMonarchy
 1160–1191
Gruffydd Maelor I
 1191–1236
Madog ap Gruffydd Maelor
 1236–1269
Gruffydd II
 1269–1277
Madog II
Historical eraMiddle Ages
 Established
1160
 Conquered and dismantled by England
1277
Preceded by
Succeeded by
Kingdom of Powys
Kingdom of England
Today part ofWales
^ Powys Fadog was often known in English as Lower Powys

Powys Fadog (English: Lower Powys or literally Madog's Powys) was the northern portion of the former princely realm of Powys. The princes of Powys Fadog would build their royal seat at Castell Dinas Brân, and their religious center at Valle Crucis Abbey. Some of its lordships included those of Maelor, Mochnant, Glyndyfrdwy, Yale, and Bromfield and Yale. Following the division of Powys, their cousin branch, the princes of Powys Wenwynwyn, would build Powis Castle.

The principality's first prince was Gruffydd Maelor I, and its last sovereign prince was Madog II ap Gruffydd, following the Conquest of Wales by king Edward Longshanks.