Numerous town houses were built, especially along Krakowskie Przedmieście, Długa, Miodowa and Senatorska. Representative city and suburban mansions were also built. The reign of King Stanisław August Poniatowski brought a significant development in scientific life, cultural and artistic. During the Four-Year Seym, in 1791 r. the Constitution was passed 3 May reforming the Polish system, strengthening the legislative power and extending the civil rights of the townspeople. In 1791 r. the law on cities was passed, thanks to which the jury-dyk was abolished and all parts of Warsaw merged. The first president of the unified political system in Warsaw was 1792 r. Ignacy Wyssogota-Zakrzewski. 17 April 1794 r. Warsaw joined the Kościuszko Uprising led by the shoemaker Jan Kiliński. During the fights with the Russian and Prussian troops, many buildings were destroyed and the suburbs of Wola and Praga were burnt.. 4 November 1794 r. Russian troops under the command of Suvorov captured Prague, killing almost the entire civilian population (so-called. the slaughter of Prague). After the third partition of Poland (24 October 1795 r.) the city was incorporated into the Prussian partition. In 1798 r. the Warsaw bishopric was established. Thanks to the reduction of legal restrictions, many Jews settled in Warsaw. In 1801 r. the Society of Friends of Sciences was established.

After French troops entered Polish territory, the Prussians withdrew from Warsaw in November 1806 r. From 18 of December 1806 r. do 30 January 1807 r. Napoleon was in Warsaw. After the peace in Tylża, St. 1807 r. Warsaw became the capital of the Duchy of Warsaw.

In 1809 r. after the battle of Raszyn to the city, on 5 Weeks, Austrian troops entered.

After the Congress of Vienna in 1815 r. Warsaw became the capital of the Kingdom of Poland. At that time, a new street network was shaped in the city, shaping of the squares, uniform buildings of many streets. Many monumental public buildings were erected. Many scientific and cultural institutions were established. In 1818 r. The University of Warsaw inaugurated its activity, a w 1825 Polytechnic school. Some buildings were demolished as part of the change of street buildings, including many churches and monasteries. In 1825 r. the number of inhabitants increased to 126000. There has been an economic recovery.

29 November 1830 r. the November Uprising broke out in Warsaw, which marked the beginning of the ongoing 9 months of the Polish-Russian war. Important battles for the war took place in the outskirts of the city: 19-20 February and 31 March near Wawer, 19-25 February near Białołęka, 25 February near Olszynka Grochowska and 6-7 September in Wola (famous for the attitudes of gen. Józef Sowiński and cf.. Julian Konstanty Ordon). From 1832 r. construction of the Citadel and additional forts began in Żoliborz, which was supposed to intimidate and discipline the inhabitants of the city.