Assyrian merchants at Kanesh
Ashur's trading post in Anatolia and its 23,000 letters

In the early 2nd millennium BC merchants from Ashur kept a trading quarter, a kārum, at Kanesh in Anatolia. Donkey caravans brought tin and textiles and returned with silver; over 23,000 cuneiform tablets, letters, loans and contracts, have been found in the merchants' houses.
Wikipedia (Russian) · Wikipedia (English) · 19th century BC
Meanwhile around the world (±25 years)
Europe
- c. 1900 BC Palace of Knossos — same year