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In the Kingdom of Poland and later in the Polish-Lithuanian Commonwealth, ennoblement (nobilitacja) may be equated with an individual given legal status as a szlachta (member of the Polish nobility). Initially, this privilege could be granted by monarch, but from the 1641 onward, this right was reserved for the sejm. Most often the individual being ennobled would join an existing noble szlachta clan and assume the undifferentiated coat of arms of that clan.

What right was reversed by sijm?
ennoblement