two mill villages Marczuk and Antoniuk. By the onset of World War II the city's territory amounted to 40 km2. The reconstruction of the city following the end of World War II and establishment of the People's Republic of Poland saw further expansion: the villages Bacieczki, Bacieczki Kolonia, Korycin and part of the village Klepacze, Krupniki, Fasty, Zaścianki and Zawady were incorporated into the city. The 70s saw another wave of expansion with the villages of Bagnówka, area of Zakłady Silikatowe, areas of state forests, Dojlidy ponds and the orthodox cemetery at Dojlidy. At the onset of the millennium, in 2002, the village Zawady was included in the city's limits and at the last enlargement, in 2006, the villages Dojlidy Górne, Zagórki and Kolonia Halickie were incorporated and the city reached its current territory of 102 km2. Districts The city of Białystok is divided into 29 administrative units, known in Polish as osiedla. The first 27 of these were created on October 25, 2004. The 28th, Dojlidy Górne, was created by on October 23, 2006, out of three settlements which had been incorporated into the city: Dojlidy Górne, Kolonia Halickie, and Zagórki. A new district called Bagnówka was created at the beginning of 2021. The center of the city, Osiedle Centrum, surrounds Lipowa Street, the main street of the city. Lipowa Street extends from Rynek Kościuszki (the corner of Spółdzielcza Street) to Plac Niepodległości im. Romana Dmowskiego (the corner of Krakowska Street). Over the centuries the name of this street has taken on a number of different names; Choroska, Nowolipie, Lipowa, Józef Piłsudski, Joseph Stalin, Adolf Hitler and Joseph Stalin, once again, to return, after the end of World War II, to its original name – Lipowa Street. The city covers of which is agricultural land, is urbanized areas, is surface waters and is wasteland. The composition of the districts vary from residential near the city center, with a combination of multi-story apartment buildings and individual houses on small parcels, to industrial and agricultural at the city edges. Metropolitan Białystok Metropolitan Białystok was designated by the Voivodeship of the Regulation No. 52/05 of 16 May 2005 to help develop the region economically. In 2006, the metropolitan area population was 450,254 inhabitants. The municipalities adjacent to Białystok are slowly losing their agricultural character, becoming residential suburban neighborhoods with single-family housing and small businesses. Demographics In June 2020, the population of the