In the 13th century, a bunch of goat herders in Anatolia decided to do something about the chaos they were living in. Their tribe had been decimated, reduced from over 15,000 to less than 1000. So they started with one market and secured it and made sure everyone of any nationality, race or religion could trade there under fair conditions. It wasn't easy because Templars, Byzantines, Mongols, Cumans, and all sorts of Bandits were ravaging the countryside.
Then they secured a small town, called Söğüt, and made it a hub of commerce. Merchants, farmers, artisans, and craftsmen flocked there from all over to do business. Warlords allied with them. Gradually they grew in power until they defeated the Byzantine Empire and became the Ottoman Empire.
They started with ONE MARKET.