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[[edit] | [edit source]]
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.