Columbia subject headings:
Catherine II, Empress of Russia, 1729-1796.
Potemkin, Grigoriĭ Aleksandrovich, kni︠a︡zʹ, 1739-1791.
Harvard subject headings:
Potemkin, Grigoriĭ Aleksandrovich, kni͡azʹ, 1739-1791.
Princeton subject headings: