Columbia subject headings:
Aristocracy (Social class)--Russia.
Nikolajević, Konstantin, 1821-1877.
Harvard subject headings:
Konstantin Nikolaevich, Grand Duke of Russia, 1827-1892.
Leontʹev, Konstantin, 1831-1891.
Nobility--Russia--Biography
Royalists--Russia--Biography--19th century.
Russia--Kings and rulers--Biography.
Russia--Politics and government--1801-1917.
Russia--Social conditions--1801-1917.
Statesmen--Russia--Biography--19th century.
Princeton subject headings: