Columbia subject headings:
Harvard subject headings:
Karl, King of Württemberg, 1823-1891.
Olga, Queen, consort of Karl I, King of Württemberg, 1822-1892.
Queens--Germany--Württemberg--Biography.
Württemberg (Germany)--History--19th century.
Princeton subject headings:
Karl,
Nicholas I, Emperor of Russia, 1796-1855.
Olga, Queen, consort of Karl I, King of Württemberg, 1822-1892.
Queens--Württemberg (Germany)--Biography.
Württemberg (Germany)--History--19th century.