Tabriz has been a place of cultural exchange since antiquity. Its historic bazaar complex is one of the most important commercial centres on the Silk Road. A bazaar has existed on the same site since the early periods of Iranian urbanism following Islam. The bazaar was mentioned by the Venetian traveler Marco Polo, who claimed to have passed through it while journeying on the Silk Road. The bazaar was inscribed as a World Heritage Site by UNESCO in July 2010.
