Nicholas I (, r Nikolai I Pavlovich; – ) was the Emperor of Russia from 1825 until 1855. He was also the King of Poland and Grand Duke of Finland. He is best known as a political conservative whose reign was marked by geographical expansion, repression of dissent, economic stagnation, poor administrative policies, a corrupt bureaucracy, and frequent wars that culminated in Russia's disastrous defeat in the Crimean War of 1853-56. His biographer Nicholas V. Riasanovsky says that Nicholas displayed determination, singleness of purpose, and an iron will, along with a powerful sense of duty and a dedication to very hard work. He saw himself as a soldier – a junior officer totally consumed by spit and polish. A handsome man, he was highly nervous and aggressive. Trained as an engineer, he was a stickler for minute detail. His reign had an ideology called "Official Nationality" that was proclaimed officially in 1833. It was a reactionary policy based on orthodoxy in religion, autocracy in government, and Russian nationalism.