Merchants relied on letters of credit long before paper money became common in Europe.

The longer version

Carrying large amounts of coin along a road invites robbery and delay, so merchants developed a paper promise instead. A banker in one city took the money and issued a document instructing a partner elsewhere to pay the bearer the agreed sum in local currency.

This worked because trading houses had branches or trusted correspondents who knew each other's seals and signatures, and because a good reputation was worth more than any single deal. Credit also let goods be bought before they were sold, and it avoided the problem of comparing many different coins and their purity.

Where this entry sits

This set looks at ancient civilizations, old inventions, trade routes, calendars, and the ordinary objects people once used every day. Nothing here is advice or opinion, just short notes about how daily life used to be organised long ago. The full list sits on the History page, where every entry is listed in order.