From A Wiki of Ice and Fire
City state, one of the Free Cities
|Location || Essos, Free Cities, the Forest of Qohor|
|Religion || Black Goat of Qohor(god)|
|Founded || Approx 1000 years ago|
Qohor is one of the nine Free Cities located in western Essos. It lies near a great forest, the Forest of Qohor. It sits on the banks of the Qhoyne, a tributary of the Rhoyne. Qohor is east of Norvos and north of Volantis.
Qohor's city guard is made up entirely of Unsullied, each carrying a spear with a braid of human hair.
Qohorik craftsmen are renowned throughout the Free Cities. Their blacksmiths have the ability to meld paint in with the metals. Some blacksmiths claim to know how to reforge Valyrian steel. The wood from the Forest of Qohor is sought after. The Qohorik worship the Black Goat. 
During the Century of Blood, the Dothraki were stopped by the Unsullied in the bloody Battle of Qohor. Qohor and Norvos broke Volantene power on the Rhoyne in a battle involving fire galleys on Dagger Lake.
Shortly after being created, the Golden Company sacked Qohor, after Qohor refused to honor the contract it had made with the Golden Company. This event established the reputation of the sellword company quickly.
When they were young, Viserys and Daenerys Targaryen spent some time in Qohor when they were wandering from place to place.
A Feast for Crows
Garin tells Arianne Martell that according to sailors in Planky Town, followers of R'hllor had rioted and tried to burn down the Black Goat.
References and Notes