This might be the largest and most glorious city on Gor.  It is situated low in the temperate latitudes in the northern hemisphere.  The city is located south of the Vosk River and north of the Cartius River.  Ar claims the land between the Vosk and the Cartius.  Ar tarnsmen do not fly south of the Cartius. There is a swamp forest to the north border of Ar.

Ar is the hereditary enemy of Ko-ro-ba. It is also an enemy of Cos and Tyros. Ar claims the southern shore of the Vosk. As Ar has no port, the Vosk is very important.

Ar is a central city containing the Home Stones of a dozen other cities. It has become an empire. It is composed of more than a hundred thousand cylinders and bridges. Its population is thought to be about two to three million free people.