Battle of Ourique: The Almoravids, led by Ali ibn Yusuf, are defeated by Prince Afonso Henriques who is proclaimed King of Portugal.

The Battle of Ourique took place on 25 July 1139, in which the forces of Portuguese count Afonso Henriques defeated those led by the Almoravid governor of Córdoba, Muhammad Az-Zubayr Ibn Umar, identified as "King Ismar" in Christian chronicles.

The Almoravid dynasty was a Berber Muslim dynasty centered in the territory of present-day Morocco. It established an empire that stretched over the western Maghreb and Al-Andalus, starting in the 1050s and lasting until its fall to the Almohads in 1147.

Ali ibn Yusuf was the 5th Almoravid emir. He reigned from 1106 to 1143.

Dom Afonso I nicknamed "the Conqueror" and "the Founder" by the Portuguese, was the first king of Portugal, from 26 July 1139 until his death on 6 December 1185. 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.