Hormuz
From Tardis Wiki, the free Doctor Who reference
During Marco Polo's initial journey to Cathay, in the 1270s, he purchased a set of chess pieces in Hormuz which Barbara Wright would later call "magnificent". (TV: "The Singing Sands" [+]Part of Marco Polo, Loading...{"namedep":"The Singing Sands (2)","1":"Marco Polo (TV story)"})
Behind the scenes
In the real world there are several places in Iran called Hormuz, however it is most likely that Marco Polo purchased them from the city in the Persian Gulf.
