After 1257, the crown was contested between Richard of Cornwall, who was supported by the Guelph party, and Alfonso X of Castile, who was recognized by the Hohenstaufen party but never set foot on German soil.
Aybak was assassinated on 10 April 1257, possibly on the orders of Shajar al-Durr, who was assassinated a week later. Their deaths left a relative power vacuum in Egypt, with Aybak's teenage son, al-Mansur Ali, as heir to the sultanate.
Al-Mansur Ali was the second Mamluk Sultan of Mamluk
Cairo, Egypt
1257
Al-Mansur Ali was the second of the Mamluk Sultans of Egypt in the Turkic, or Bahri, line. Some historians, however, consider Shajar al-Durr as the first of the Mamluk Sultans.
