From 1814 he supported the Russian Empire, seen as a Pan-Slavist ally of Poland, and favored the idea of a great Slavic monarchy. After the fall of the Duchy of Warsaw in 1815, he became a member of the government of the newly created small state of Congress Poland (in personal union with Russia), initially in the new Ministry of Education and Religion, in 1816 serving as deputy minister. In 1815 he was decorated with the Order of Saint Stanislaus. In 1819 he endorsed a controversial censorship law, damaging his reputation.