With the passive attitude of the Soviet forces and the great involvement of the German forces, the Nazis gradually limited the areas occupied by the insurgents and systematically demolished the city's buildings. The civilian population was taken out of the city to temporary camps, and then to various towns in the General Government. 16-23 September 1944 r. soldiers of the 1st Army of the Polish Army captured 3 abutments in the left-bank area of Warsaw, however, they did not hold them. The insurgents capitulated 2 October 1944 r. after 63 days of fierce fighting. died approx. 18 000 insurgents and 200000 city residents. After the fall of the uprising, the Germans continued the demolition of the deserted city. In December 1944 r. they destroyed the Royal Castle. 17 January 1945 r. as a result of the attack of the Red Army, German troops were forced out of the left-bank part of the city.
Soon, representatives of the so-called. Of the Lublin Government. 15 of December 1948 r. in Warsaw, the PPR merged with the PPS into the Polish United Workers' Party (solved in 1990 r.). The gradual reconstruction of the city began. Destroyed buildings were rebuilt, communication routes and bridges. New public utility buildings were built, new streets were marked out, new housing estates were built (m.in. Marszałkowska Residential District – MDM), new workplaces started production (Passenger Cars Factory, Żerań CHP Plant). W 1953 r. the reconstruction of the Warsaw Old Town has been completed (without the Royal Castle).
W 1955 r. in the city was signed by European socialist countries, the so-called. Warsaw Pact. In the same year, the Palace of Culture and Science was put into operation. After 1956 r. there was an expansion of the city and its industry. New housing estates were built (mainly located on the outskirts of the city) and gigantic industrial plants (Huta Warszawa). Communication investments were also carried out (Gdańsk Bridge, Gdańsk Railway Station, Śródmieście railway station, widening of main exit streets).
After 1970 r. in Warsaw, construction of new housing estates has been intensified (Ursynów and Natolin), reconstruction of the Royal Castle began, the Central Railway Station was built. Modern buildings were built (hotel, office buildings), the city's communication system has been modified (Łazienkowska Route, Wisłostrada). In years 1977-79 a pediatric hospital was launched – Children's Health Center. After 1981 r. Basic works on the construction of the metro have started (the first episode was launched in 1995 r.) and Trasa Toruńska with a new bridge over the Vistula.
The 1980s generally brought economic stagnation and slowdown of many investments. Housing construction has been reduced. W 1989 r. in Warsaw breakthrough talks for the Polish system took place at the "round table". Warsaw is developing dynamically in the new economic and political conditions (especially as a commercial and service center). Many new buildings are being built (company headquarters, banks, hotels), residential buildings and single-family housing estates. Many plants have changed owners, new ones were created, some have been closed, communication systems were modernized. Warsaw has strengthened as one of the main political centers of Central Europe and as a commercial center, informative, scientific, cultural and artistic country.
In the nineties, many new monuments were erected in Warsaw in honor of merit or in memory of events and anniversaries, commemorative plaques were unveiled – it is, undoubtedly, a sign of our time.
Monuments erected in the interwar period and the plaques funded at that time were partially reconstructed. However, many of the post-war ones – dismantled. Many streets and squares have been renamed for political reasons.