Aleppo Soap, according to the traditional recipe which is composed of only two oils, olive and bay laurel, is superfatted and made here by cold saponification. One of the best known traditional soaps, along with Marseille soap and Castile soap, is Aleppo soap. This soap is the oldest of the three, it is believed to have been made more than 3500 years ago. Due to the Crusades it gave birth in the 12th century first to the famous Castile soap (cold saponified), then later in the 15th century to Marseille soap (saponified hot). Traditional Middle Eastern Aleppo Soap is made by hot saponification, cooked in a cauldron.