Sayf al-Dīn Salār al-Manṣūrī (c. 1260s–September or October 1310) was the viceroy of the Mamluk sultan al-Nasir Muhammad during the latter's second reign (1299–1310). As a boy he was taken captive at the Battle of Elbistan in 1277 and became a mamluk (slave soldier) of the emir al-Salih Ali and eleven years later by the latter's father Sultan Qalawun. Salar distinguished himself in his training as a skilled horseman among other mamluks of the Mansuriyya faction (mamluks of Qalawun). He was promoted to the rank of ustadar (majordomo) by his friend, Sultan Lajin in 1299. After participating in Lajin's assassination later that year he effectively became the strongman of the sultanate alongside Baybars al-Jashnakir. Despite tensions and incidents between their respective factions, Salar and Ba