Karum (trade post)

Karum (Akkadian: "kārum" "quay, port, commercial district", plural "kārū", from Sumerian "kar" "fortification (of a harbor), break-water") is the name given to ancient Assyrian trade posts 
in Anatolia (modern Turkey) from the ~25th to 18th centuries BC. The main centre of "karum" trading was at the ancient town of Kanesh.
Assyrian settlements.
Early references to "karu" come from the Ebla tablets; in particular, a vizier known as Ebrium concluded the earliest treaty fully known to archaeology, known variously as the "Treaty between Ebla and Aššur" or the "Treaty with Abarsal" (scholars have disputed whether the text refers to Aššur or to Abarsal, an unknown location). In either case, the other city contracted to establish "karu" in Eblaite territory (Syria), among other things.
Sargon the Great (of Akkadia) who likely destroyed Ebla soon afterward, is said in a much-later Hittite account to have invaded Anatolia to punish Nurdaggal, the king of Purushanda (in Anatolia), for mistreating the Akkadian and Assyrian merchant class in the "karu" there. However, no contemporary source mentions that to be the case.
During the 2nd millennium BC, Anatolia was under the sovereignty of Hatti city-states and later the Hittites. By 1960 BC, Assyrian merchants had established the "karu", small colonial settlements next to Anatolian cities, which paid taxes to the rulers of the cities. There were also smaller trade stations which were called "mabartū" (singular "mabartum"). The number of "karu" and "mabartu" was probably around 20. Among them were Kültepe (Kanesh in antiquity) in modern Kayseri Province; Alişar Hüyük (Ankuva (?) in antiquity) in modern Yozgat Province; and Boğazköy (Hattusa in antiquity) in modern Çorum Province. (However, Alişar Hüyük was probably a "mabartum".) However, after the establishment of the Hittite Empire, the "karu" disappeared from Anatolian history.
Trade.
In the 2nd millennium BC, money had not yet been invented, and Assyrian merchants used gold for wholesale trade and silver for retail trade. Gold was considered eight times more valuable than silver. However, another metal, "amutum", was even more valuable than gold. It is thought to be the newly-discovered iron and was forty times more valuable than silver.
The most important Anatolian export was copper, and the Assyrian merchants sold tin and clothing to Anatolia.
Legacy.
The name "Karum" is given to an upscale shopping mall in Çankaya district of modern-day Ankara, Turkey. It is a reference to the presence of "karu" in Asia Minor since the very early days of history. Another mall in Ankara's Bilkent district is given the name "Ankuva". That is also a reference to archaeological discoveries of various "karu" in Central Anatolia.