Theresa, Countess of Portugal

Theresa (c. 1080–1130) was the illegitimate daughter of Alfonso VI of León. In 1093 she married the French nobleman Henry of Burgundy, receiving the County of Portugal from her father in 1096.

Widowed in 1112, she defended Coimbra and in 1116 was recognized queen by Pope Paschal II. War with her half-sister Queen Urraca ended with her capture at Lanhoso in 1121 and accepting vassalage to León, though she retained her royal title. Portuguese nobles and clergy supported her son Afonso Henriques, who defeated her at São Mamede in 1128 and exiled her; she died in 1130.