Sarmatism
"Sarmatism" (also, "Sarmatianism") is a term designating the dominant lifestyle, culture and ideology of the szlachta (nobility) of the Polish-Lithuanian Commonwealth from the 16th to the 19th centuries. Together with "Golden Liberty," it formed a central aspect of the Commonwealth's culture. At its core was the belief that Polish nobles were descended from the ancient Sarmatians. It has been celebrated by adherents as well as sharply criticized.
Read more about Sarmatism.