Forex first existed in ancient times 1. Money-changing people, people helping others to change money and also taking a commission or charging a fee were living in the times of the Talmudic writings (Biblical times). These people (sometimes called "kollybistẻs") used city-stalls, at feast times the temples Court of the Gentiles instead 2. The money-changer was also in more recent ancient times silver-smiths and, or, gold-smiths 3.
During the fourth century the Byzantium government kept a monopoly on forexes 4.