Coordinates: 31°28′04″N 34°24′15″E / 31.467665°N 34.404297°E
Tall al-Ajjul or Tell el-'Ajul is an archaeological mound or tell in the Gaza Strip. The fortified city excavated at the site dates as far back ca. 2000-1800 B.C. and was inhabited during the Bronze Age. It is located at the mouth of Wadi Ghazzah just south of the town of Gaza.
Archaeologists have excavated remains dated mainly to the Middle and Late Bronze Age. Large quantities of pumice were deposited during the Late Bronze Age, which may have been caused by the Thera (Santorini) volcanic eruption. If proven correct, this would offer a good correlation and dating tool.
The Sixth Crusade came to an end with the so-called Treaty of Jaffa and Tell Ajul. These were in fact two different treaties, the first being the one signed at Tell Ajul by the competing Ayyubid rulers of Egypt, Syria and various smaller principalities. This treaty settled their territorial disputes and left Sultan Al-Kamil of Egypt in a very powerful position. The follow-up treaty was signed at Jaffa by Al-Kamil and the leader of the Sixth Crusade, Emperor Frederick II, removing also the threat posed to Al-Kamil by the European armies.