Alfonso IX of León

Alfonso IX
Adeffonsus, king of Galicia and Leon (detail).jpg
Depiction on the Tumbo A cartulary of the Cathedral of Santiago de Compostela
King of León and Galicia
Reign22 January 1188 – 24 September 1230
PredecessorFerdinand II
SuccessorFerdinand III
Born15 August 1171
Died23/24 September 1230(1230-09-24) (aged 59)
Villanueva de Sarria
Theresa of Portugal
(m. 1191; annulled 1196)

Berengaria of Castile
(m. 1197; annulled 1204)
among others...
Constance, Abbess of Las Huelgas
Ferdinand III
Alfonso of Molina
Berengaria, Latin Empress
HouseCastilian House of Ivrea
FatherFerdinand II of León
MotherUrraca of Portugal
ReligionRoman Catholicism

Alfonso IX (15 August 1171 – 23 or 24 September 1230) was king of León and Galicia from the death of his father Ferdinand II in 1188 until his own death.

He took steps towards modernizing and democratizing his dominion and founded the University of Salamanca in 1212. In 1188 he summoned the first parliament reflecting the fullest representation of the citizenry ever seen in Western Europe, the Cortes of León.[1]

He took part in the work of the Reconquest, conquering the area of Extremadura (including the cities of Cáceres and Badajoz).[citation needed]


Alfonso was born in Zamora. He was the only son of King Ferdinand II of León and Urraca of Portugal.[1] His father was the younger son of Alfonso VII of León and Castile, who divided his kingdoms between his sons, which set the stage for conflict in the family until the kingdoms were re-united by Alfonso IX's son Ferdinand III of Castile.[2]