Erciyes

From the White Wolf Wiki, the most complete White Wolf reference

Erciyes, also called Argaeus, is a mountain stronghold in central Cappadocia which served as a base for for clan Cappadocian and was abandoned after the Giovanni took over the clan. While Erciyes is intimately associated with the Cappadocians, it was one of several underground cave complexes used by the clan, the other notable ones being Kaymakli and Derinkuyu.

Erciyes was taken over by the Cappadocians in a mass assault (the only military action in the history of the clan) sometime in the 1st century BCE, when they replaced a mountain monastery originally serving as a cult for a Malkavian Osiris. Since that time, the clan supported a temple complex at the mountain dedicated to the Cappadocian study of death and God. This temple was Christian (as Cappadocians tended to be), but the monastery of shadows was known for its strange and horrifying secrets.

After the Feast of Folly, Cappadocius relocated to Erciyes, and spent the remainder of his unlife in and around the temple complex. After his diablerie, the temple was sacked by the Giovanni and abandoned.