his accession to the Confederation of Targowica and he enhanced to revolt against the Russians and the administration which had control over the Polish–Lithuanian Commonwealth. Later he became the Marshal of the Sejm of the Duchy of Warsaw in 1809 and later President of the Senate of the Duchy of Warsaw and the Kingdom of Poland. He died on 5 February 1817 in Warsaw. Awards Knight of the Order of Saint Stanislaus, awarded in 1777 Knight of the Order of the White Eagle, awarded 1780. Bibliography Tomasz Kitzwalter, Ostrowski Tomasz Adam (1735-1817), in: Polski Słownik Biograficzny [Polish Biographical Dictionary], vol. XXIV, Wrocław 1979, pp. 579–583 (biographical note in Polish). References 1735 births 1817 deaths Polish Army officers Counts of Poland Senators of the Duchy of Warsaw Members of the Sejm of Duchy of Warsaw Marshals of the Sejm of a Partitioned Poland Senators of Congress Poland People from Tomaszów Mazowiecki Recipients of the Order of the White Eagle (Poland)