Question:  Peter Kalifornsky was the great grand son of Qadanalchen who worked in a the hub of the southernmost Russian settlements in North America from 1812 to 1842 that has been the subject of what?
Sentence (from "Fort Ross, California"): Fort Ross (Russian: Форт-Росс ), originally Fortress Ross (Крѣпость Россъ , "Krepostʹ Ross"), is a former Russian establishment on the west coast of North America in what is now Sonoma County, California, in the United States.
Relevant evidence: Yes