The Partition Sejm () was a Sejm lasting from 1773 to 1775 in the Polish–Lithuanian Commonwealth, convened by its three neighbours (the Russian Empire, Prussia and Austria) in order to legalize their First Partition of Poland. During its first days in session, that Sejm was the site of Tadeusz Rejtan's famous gesture of protest against Partition. The Sejm also passed other legislation, notably establishing the Permanent Council and the Commission of National Education. Cardinal Laws were confirmed. The new legislation was guaranteed by the Russian Empire, giving it another excuse to interfere in the Commonwealth politics if the legislation it favored was changed. Russia was the party most determined to form the Permanent Council, which it saw as further means to control the Commonwealth. The creation of the Commission of National Education, the Commonwealth's and Europe's first ministry of education, is seen as the proudest and most constructive achievement of the otherwise often-deplored Partition Sejm. Background In the late 17th and early 18th centuries the Polish-Lithuanian Commonwealth was reduced from the status of a major European power to that of a Russian protectorate (or vassal or satellite state). Russian tsars effectively chose Polish-Lithuanian monarchs utilizing the "free elections" and decided the outcome of much of Poland's internal politics. The Repnin Sejm, for example, was named after the Russian ambassador who unofficially presided over the proceedings. The Partition Sejm and the First Partition occurred after the balance of power in Europe shifted, with Russian victories against the Ottomans in the Russo-Turkish War (1768–1774) strengthening Russia and endangering Habsburg interests in that region (particularly in Moldavia and Wallachia). At that point, Habsburg Austria considered waging a war against Russia. Prussia, friendly towards both Russia and Austria, suggested a series of territorial adjustments, in which Austria would be compensated by parts of Prussian Silesia, and Prussia in turn would receive Polish Ermland (Warmia) and parts of the Royal Prussia, a Polish fief already under Baltic German hegemony. King Frederick II of Prussia had no intention of giving up Silesia, gained recently in the Silesian Wars. He was, however, also interested in finding a peaceful solution – his alliance with Russia would draw him into a potential war with Austria, and the Seven Years' War had left Prussia's treasury and army weakened. He was also interested in protecting the weakening Ottoman Empire, which could be advantageously utilized in the event of a Prussian war