In 1922, Katowice and the eastern portion of Upper Silesia were annexed by Poland, and an autonomous Silesian Voivodeship was established, with Katowice as its capital. This event has marked the beginning of a period of unprecedented architectural development in the city. Since most traditional styles, especially gothic and gothic revival, were perceived as connected to imperial Germany by the new Polish authorities, all new development was to be built in, at first in the neoclassical, and later in functionalist/Bauhaus style. The city, which needed to build administrative buildings for the new authorities and housing for people working in regional administration, began expansion southward creating one of the largest complexes of modern architecture in Poland, comparable to Warsaw and Gdynia (newly built port on the Baltic Sea) only.