Treaty of Granada
1491 CE.
Shown on the map at 37.178°, -3.590°.
The Treaty of Granada, also known as the Surrender of Granada or the Capitulations, was signed and ratified on November 25, 1491, between Boabdil, the sultan of Granada, and Ferdinand and Isabella, the King and Queen of Castile, León, Aragon, and Sicily. It ended the Granada War, which had started in 1482 and culminated in the siege and battle of Granada, which began in spring 1491.
Text from the Wikipedia article Treaty of Granada (1491), licensed CC BY-SA 4.0.