The Monastery of Batalha, literally the Monastery of the Battle, is a Dominican convent in the civil parish of Batalha, in the district of Leiria, in central region of Portugal. Originally, and officially known, as the Monastery of Saint Mary of the Victory, it was erected in commemoration of the 1385 Battle of Aljubarrota, and would serve as the burial church of the 15th-Century Aviz dynasty of Portuguese royals. It is one of the best and original examples of Late Gothic architecture in Portugal, intermingled with the Manueline style.
The convent was built to thank the Virgin Mary for the Portuguese victory over the Castilians in the battle of Aljubarrota in 1385, fulfilling a promise of King John I of Portugal. The battle put an end to the 1383-1385 crisis.