oldest theaters in Poland, the Komedialnia, was founded in the city. New schools were established, including a ballet school in connection with the foundation of the theater. In 1749, King Augustus III of Poland extended the city limits. In 1770, under the auspices of Izabella Poniatowska, a midwifery school was founded, based on which the Institute of Obstetrics was established in 1805. The end of the eighteenth century saw the division of the Polish–Lithuanian Commonwealth, in three steps, among the neighboring states. The Kingdom of Prussia acquired Białystok and the surrounding region during the third partition. The city became the capital of the New East Prussia province in 1795. Prussia lost the territory following Napoleon Bonaparte's victory in the War of the Fourth Coalition as the resultant 1807 Treaties of Tilsit awarded the area to the Russian Empire, which organized the region into the Belostok Oblast, with the city as the regional center. Schooling and higher learning in Białystok, which was intensively developed in the 18th century, was stopped as a result of partitions. Later in the 19th century, Białystok grew into a significant center of the textile industry, the largest after Łódź in then-partitioned Poland. In 1862 a railway connection was launched, connecting Białystok with Warsaw, Grodno, Wilno and Saint Petersburg. After the failed November and January uprisings, Russification policies and anti-Polish repressions intensified, and after 1870 a ban on the use of Polish in public places was introduced. In 1912, a Tsarist prison was built, which also served as a transit prison for Poles deported to Siberia. At the end of the nineteenth century, as a result of the influx due to Russian discriminatory regulations, the majority of the city's population was Jewish. According to Russian census of 1897, out of the total population of 66,000, Jews constituted 41,900 (so around 63% percent). This heritage can be seen on the Jewish Heritage Trail in Białystok. The Białystok pogrom occurred between 14 and 16 June 1906 in the city. During the pogrom between 81 and 88 Jews were killed by the Russians, and about 80 people were wounded. The first anarchist groups to attract a significant following of Russian workers or peasants were the anarcho-communist Chernoe-Znamia groups, founded in Białystok in 1903. During World War I the Bialystok-Grodno District was the administrative division of German-controlled territory of Ober-Ost. It comprised the city, as the capital, and the surrounding Podlaskie