Upper Silesian–Dąbrowa Basin Metropolis
The Metropolis GZM (Polish: Metropolia GZM, formally in Polish Górnośląsko-Zagłębiowska Metropolia (Upper Silesian-Dąbrowa Basin Metropolis) is a metropolitan association (Polish: związek metropolitalny) composed of 41 contiguous gminas, with a total population of over 2 million, covering most of the Katowice metropolitan area in the Silesian Voivodeship of Poland. The seat of metropolitan administration is Katowice, the largest member city and the voivodeship capital.
Source: Wikipedia — Upper Silesian–Dąbrowa Basin Metropolis (CC BY-SA 4.0)