أحمد سنجر
In 1037, the Seljuq Turkmens, a clan of Oghuz Turks moving from the steppes east of the Aral Sea, peacefully took over Merv under the leadership of Tughril—the Ghaznavid sultan Mas'ud I was extremely unpopular in the city. Tugril's brother Chaghri stayed in Merv as the Seljuq domains grew to include the rest of Khurasan and Iran, and it subsequently became a favorite city of the Seljuq sultans. Chaghri, his son Alp Arslan (sultan from 1063 to 1072) and great-grandson Ahmad Sanjar (sultan from 1118 to 1157) were all buried at Merv, the latter at the Tomb of Ahmad Sanjar.