Nicholas I (1796 - 1855). Emperor and Autocrat of All the Russias from 1825 until his death in 1855. He married Charlotte of Prussia and had seven children. Under his reign Russia reached its historical zenith, spanning over 20 million square kilometers.
Portrait of Nicholas I of Russia. He was third son of Paul I of Russia and younger brother of Alexander I. Alexander I died childless and the next brother in line Constantine Nikolaevich refused to accept the throne for himself, making Nicholas, the third son, next in line. Nicholas ruled from 1825 until 1855.