>>25032960
>Radhanites functioned as neutral go-betweens
https://en.wikipedia.org/wiki/Radhanite
early medieval Jewish merchants, active in the trade between Christendom and the Muslim world
Historically, Jewish communities used letters of credit to transport large quantities of money without the risk of theft from at least classical times. This system was developed and put into force on an unprecedented scale by medieval Jewish merchants such as the Radhanites; if so, they may be counted among the precursors to the banks that arose during the Late Middle Ages and early modern period. Radhanites may have played a role in the conversion of the Khazars to Judaism.
These merchants speak Arabic, Persian, Roman, the Frank, Spanish, and Slav languages. They journey from West to East, from East to West, partly on land, partly by sea. They transport from the West eunuchs, female slaves, boys, brocade, castor, marten and other furs, and swords. They take ship from Firanja (France), on the Western Sea, and make for Farama (Pelusium). There they load their goods on camel-back and go by land to al-Kolzum (Suez), a distance of twenty-five farsakhs. They embark in the East Sea and sail from al-Kolzum to al-Jar and al-Jeddah, then they go to Sind, India, and China. On their return from China they carry back musk, aloes, camphor, cinnamon, and other products of the Eastern countries to al-Kolzum and bring them back to Farama, where they again embark on the Western Sea. Some make sail for Constantinople to sell their goods to the Romans; others go to the palace of the King of the Franks to place their goods. Sometimes these Jewish merchants, when embarking from the land of the Franks, on the Western Sea, make for Antioch (at the head of the Orontes River); thence by land to al-Jabia (al-Hanaya on the bank of the Euphrates), where they arrive after three days' march. There they embark on the Euphrates and reach Baghdad, whence they sail down the Tigris, to al-Obolla. From al-Obolla they sail for Oman, Sindh, Hind, and China.
These different journeys can also be made by land. The merchants that start from Spain or France go to Sus al-Aksa (in Morocco) and then to Tangier, whence they walk to Kairouan and the capital of Egypt. Thence they go to ar-Ramla, visit Damascus, al-Kufa, Baghdad, and al-Basra, cross Ahvaz, Fars, Kerman, Sind, Hind, and arrive in China.
Sometimes, also, they take the route behind Rome and, passing through the country of the Slavs, arrive at Khamlidj, the capital of the Khazars. They embark on the Jorjan Sea, arrive at Balkh, betake themselves from there across the Oxus, and continue their journey toward Yurt, Toghuzghuz, and from there to China.