Media is divided into two parts. One part of it is called Greater Media, of which the metropolis is Ecbatana, a large city containing the royal residence of the Median empire (the Parthians continue to use this as a royal residence even now, and their kings spend at least their summers there, for Media is a cold country; but their winter residence is at Seleuceia, on the Tigris near Babylon). The other part is Atropatian Media, which got its name from the commander1
Atropates, who prevented also this country, which was a part of Greater Media, from becoming subject to the Macedonians. Furthermore, after he was proclaimed king, he organized this country into a separate state by itself, and his succession of descendants is preserved to this day, and his successors have contracted marriages with the kings of the Armenians and Syrians and, in later times, with the kings of the Parthians.