In 1862, Grand Duke Constantine Nikolaievich was appointed viceroy of Russian Poland by his brother and moved to Warsaw with his wife and children. The stay in Poland proved difficult for the Grand Duke, who was the victim of a nationalist assassination attempt the day after his arrival in the Polish capital. Although Constantine embarked on a program of liberalization and re-instated Polish as an official language, Polish nationalists agitating for reform were not appeased. Finally, an uprising in January 1863 and the radicalization of the separatists pushed the Tsar to recall his brother in August. Olga's difficult experiences in Poland marked her profoundly.