Columbia subject headings:
Nicholas I, Emperor of Russia, 1796-1855--Pictorial works.
Nicholas I, Emperor of Russia, 1796-1855--Portraits.
Nicholas I, Emperor of Russia, 1796-1855.
Russia--History--Nicholas I, 1825-1855.
Russia--Kings and rulers--Portraits.
Harvard subject headings:
Nicholas I, Emperor of Russia, 1796-1855
Nicholas I, Emperor of Russia, 1796-1855--Pictorial works.
Nicholas I, Emperor of Russia, 1796-1855--Portraits.
Russia--History--Nicholas I, 1825-1855
Russia--Kings and rulers--Portraits.
Princeton subject headings: