Afonso I of Portugal

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Afonso I
Depiction in the Castilian manuscript Compendium of Chronicles of Kings, c. 1312–1325
King of Portugal
Reign	26 July 1139 – 6 December 1185
Acclamation	25 July 1139
Successor	Sancho I
Count of Portugal
Reign	1112 – 25 July 1139
Predecessor	Henry
Co-count	Theresa (1112–1128)[1]
Regent	Theresa (1112–1128)
Born	Alphonso Henryquez[citation needed] 1106, 25 July 1109, August 1109 or 1111 Guimarães (some argue Viseu)
Died	6 December 1185 (aged c. 73–79) Coimbra, Portugal
Burial	Santa Cruz Monastery, Coimbra
Spouse	Matilda of Savoy ​ ​ (m. 1146; died 1157)​
Issue Detail	Urraca, Queen of León Teresa, Countess of Flanders Mafalda Sancho I, King of Portugal
House	Burgundy
Father	Henry, Count of Portugal
Mother	Theresa, Countess of Portugal

Afonso I^[a] (Portuguese pronunciation: [ɐˈfõsu]; 1106/1109/1111 – 1185), also called Afonso Henriques, nicknamed the Conqueror (Portuguese: O Conquistador) and the Founder (Portuguese: O Fundador)^[2][3] by the Portuguese, was the first king of Portugal. He achieved the independence of the County of Portugal, establishing a new kingdom and doubling its area with the Reconquista, an objective that he pursued until his death.

Afonso was the son of Theresa of León and Henry of Burgundy, rulers of the County of Portugal. Henry died in 1112, leaving Theresa to rule alone. Unhappy with Theresa's romantic relationship with Galician Fernando Pérez de Traba and his political influence, the Portuguese nobility rallied around Afonso, who revolted and defeated his mother at the Battle of São Mamede in 1128 and became sole Count of Portugal soon afterwards. In 1139, Afonso renounced the suzerainty of the Kingdom of León and established the independent Kingdom of Portugal.

Afonso actively campaigned against the Moors in the south. In 1139 he won a decisive victory at the Battle of Ourique, and in 1147 he seized Santarém and Lisbon from the Moors, with help from men on their way to the Holy Land for the Second Crusade. He secured the independence of Portugal following a victory over León at Valdevez and received papal approval through Manifestis Probatum. Afonso died in 1185 and was succeeded by his son, Sancho I.

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