The Moneychangers

The business of the money changers was also very sophisticated. They would sit at little tables and exchange the money which the pilgrim brought to pay for the sacrifices. The common currency was in Roman coins, and in the Temple the coins were required to be changed for clean Jewish Temple currency. There was actually a fee to exchange this money into clean Temple currency.

Link: https://bible-history.com/new-testament/jesus-cleanses-the-temple