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The Crusades, which continued in Egypt and Syria between 1095-1291, brought Egyptian alum against them, and they were interested in its trade and started to carry raw materials for dyeing European wool. Even in the years when Saladin's struggles with the Crusaders continued, Genoese merchants achieved great income by transporting Egyptian alum from Alexandria to Europe. With the discovery of Anatolian alum mines towards the middle of the thirteenth century, Italian Merchants turned their attention to mines such as Focha, Gediz and Shebinkarahisar. This process has drawn them into a series of events, from power struggles to internal turmoil. In this process, the Italians, who tried to be close to the ruling powers in Anatolia from the Byzantines to the Ottomans, also entered into rivalries among themselves over alum. In this process, they increased their income by helping the Ottomans in the Byzantine and dynastic struggles, and even managed to get their debts erased. With the discovery of European alum in the middle of the fifteenth century, new fractures were experienced. With the revenues of this precious metal, the popes tried to start a new Crusade against the Ottomans, and they used the alum revenues as a weapon. Italian and Neapolitan people, to whom the Popes transferred their rights to these mining enterprises, continued the interests and interests of the Crusades. This new processal so opened the door for the Ottomans to not benefit from an important source of income properly. [ABSTRACT FROM AUTHOR]