Shajar al-Durr
In 1250, when the Ayyubid sultan as-Salih Ayyub died, the Mamluks he had owned as slaves murdered his son and heir al-Muazzam Turanshah, and Shajar al-Durr the widow of as-Salih became the Sultana of Egypt. She married the Atabeg (commander in chief) Emir Aybak and abdicated, Aybak becoming Sultan. He ruled from 1250 to 1257.