Tomasz Adam Ostrowski was a Polish

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 nobleman (szlachcic), Count since 1798

Tomasz became Colonel of the Crown Army in 1765, Chamberlain

Chamberlain (office)

A chamberlain is an officer in charge of managing a household. In many countries there are ceremonial posts associated with the household of the sovereign....

 of King Stanisław August Poniatowski in 1767, castellan

Castellan

A castellan was the governor or captain of a castle. The word stems from the Latin Castellanus, derived from castellum "castle". Also known as a constable.-Duties:...

 of Czersk

Czersk

Czersk is a town in northern Poland in Chojnice County, Pomeranian Voivodeship.On July 1, 2006 this municipality celebrated 80 years of granting this community the status of city....

 since 1777, Court Treasurer since 1791, Marshal of the Sejm

Sejm

The Sejm is the lower house of the Polish parliament. The Sejm is made up of 460 deputies, or Poseł in Polish . It is elected by universal ballot and is presided over by a speaker called the Marshal of the Sejm ....

 of the Duchy of Warsaw

Duchy of Warsaw

The Duchy of Warsaw was a Polish state established by Napoleon I in 1807 from the Polish lands ceded by the Kingdom of Prussia under the terms of the Treaties of Tilsit. The duchy was held in personal union by one of Napoleon's allies, King Frederick Augustus I of Saxony...

 in 1809 and later President of the Senate

Senate

A senate is a deliberative assembly, often the upper house or chamber of a legislature or parliament. There have been many such bodies in history, since senate means the assembly of the eldest and wiser members of the society and ruling class...

 of the Duchy of Warsaw and the Kingdom of Poland

Congress Poland

The Kingdom of Poland , informally known as Congress Poland , created in 1815 by the Congress of Vienna, was a personal union of the Russian parcel of Poland with the Russian Empire...

.

He was a member of the Permanent Council

Permanent Council

The Permanent Council was the highest administrative authority in the Polish-Lithuanian Commonwealth between 1775 and 1789 and the first modern government in Europe...

 (Rada Nieustająca), and an opponent of the Targowica Confederation

Targowica Confederation

The Targowica Confederation was a confederation established by Polish and Lithuanian magnates on 27 April 1792, in Saint Petersburg, with the backing of the Russian Empress Catherine II. The confederation opposed the Polish Constitution of May 3, 1791, which had been adopted by the Great Sejm,...

. He was a member of the "Assembly of Friends of the May 3 Constitution" (May 3 Constitution). He was politically tied to King Stanisław August Poniatowski, and he also participated in the "Thursday dinners

Thursday Dinners

The Thursday Dinners were meetings of artists, intellectuals, and statesmen held by the last King of Poland, Stanislaus Augustus Poniatowski in the era of Enlightenment in Poland....

" held by the king.

Awards

• Knight of the Order of Saint Stanislaus
  Order of Saint Stanislaus
  The Order of Saint Stanislaus , also spelled Stanislas, was an Order in the Polish-Lithuanian Commonwealth and The Kingdom of Poland between 1765 and 1831 and of Russian Empire from 1831 to 1917.-History of the Order of Saint Stanislaus:Stanisław August Poniatowski, King of Poland, established the...
  
  , awarded in 1777
• Knight of the Order of the White Eagle, awarded 1780.

Basic Bibliography

• Tomsz Kitzwalter, Ostrowski Tomasz Adam (1735-1817), in: Polski Słownik Biograficzny [Polish Biographical Dictionary], vol. XXIV, Wrocław 1979, pp. 579-583 (biographical note in Polish).