Sixth Crusade
In 1229 a somewhat similar double treaty was signed, one in Tell el-Ajjul and one in Jaffa, which together brought to an end the Sixth Crusade. The treaties of Tell Ajjul and Jaffa settled the territorial disputes between the competing Ayyubid rulers of Egypt, Syria and various smaller principalities, allowing to Sultan Al-Kamil of Egypt to close a diplomatic deal with the leader of the Sixth Crusade, Emperor Frederick II.