lar supposition derives "Black Sea" from the dark color of the water or climatic conditions. Some scholars understand the name to be derived from a system of color symbolism representing the cardinal directions, with black or dark for north, red for south, white for west, and green or light blue for east. Hence "Black Sea" meant "Northern Sea". According to this scheme, the name could only have originated with a people living between the northern (black) and southern (red) seas: this points to the Achaemenids (550–330 BC). In the Greater Bundahishn, a Middle Persian Zoroastrian scripture, the Black Sea is called Siy?bun. In the tenth-century Persian geography book Hudud al-'Alam, the Black Sea is called Georgian Sea (dary?-yi Gurz). The Georgian Chronicles use the name z?ua sperisa ???? ??????? (Sea of Speri) after the Kartvelian tribe of Speris or Saspers. Other modern n
