A: İstanbul, Turkey, B: Venezia, Veneto, Italy, C: Xicheng Qu, Beijing Shi, China, D: Sudak
In 1266 Venetian traders Niccolò and Maffeo Polo, the father and uncle of Marco Polo, were among the first Westerners to travel the Silk Road to China. Before the birth of Marco, they established trading posts in Constantinople, Sudak in the Crimea, and in a western part of the Mongol Empire. In 1266 the Polos reached the seat of Kublai Kahn in the Mongol capital Khanbaliq, Khanbaliq or Dadu (also Ta-Tu or Daidu), now Beijing.
Marco Polo, who wrote the famous account of the travels of his father and uncle, did not accompany them on this expedition.