Salah El-Din castle

It was built by Baldwin I, who was the King of Jerusalem, in 1116 AD because the island was situated on a place of strategical importance: in the crossroads of trade and pilgrim routes from Egypt (Sinai) and Syro-Palestine to the Arab Peninsula with holy Mecca. The Crusaders pursued two objectives: for one thing, to defend southeastern corner of the Kingdom of Jerusalem against its Muslim neighbours, for another, to exact a ransom from the passing Muslim pilgrims.[3] Location of the castle was easily defendable on high ground, in the narrowest part on the Gulf of Aqaba.[2][4]

The castles played a major rule in the Crusades, Mamluk and Ottoman eras.[2] A battle took place on the island in about 1170 where the fortress was captured by Salah El-Din, who largely expanded the fortress. After that period the Mamelukes and Ottomans had some further additions to the fortress.[4] The fortress has many small rooms, which include sleeping quarters for troops, bathhouses, and kitchens with huge ovens. There are towers for pigeons, which were used for relaying messages and also circular towers for archers.