Afonso Henriques

Path to sole rulership

In 1128, near Guimarães at the Battle of São Mamede, Afonso and his supporters overcame troops under both his mother and her lover, Count Fernando Pérez de Traba of Galicia. Afonso exiled his mother to Galicia, and took over rule of the County of Portucale. Thus the possibility of re-incorporating Portucale into a Kingdom of Portugal and Galicia as before was eliminated and Afonso became sole ruler following demands for greater independence from the county's church and nobles. The battle was mostly ignored by the Leonese suzerain, who was occupied at the time with a revolt in Castile. He was also, most likely, waiting for the reaction of the Galician families. After Theresa's death in 1131, Alfonso VII of León proceeded to demand vassalage from his cousin. On 6 April 1129, Afonso Henriques dictated the writ in which he proclaimed himself Prince of Portugal or Prince of the Portuguese, an act informally allowed by Alfonso VII, as it was thought to be Afonso Henriques's right by blood, as one of two grandsons of the Emperor of Hispania.