On 1 April 1922 it became a district-free city, but this status was revoked on 1 October 1933 while part of Nazi Germany.The Soviet Red Army occupied Grünberg with little fighting in February 14, 1945 during World War II.However, nowadays wine is no longer produced in Zielona Góra itself (the last factory was closed in the early 1990s).
In 1488, Duke Janusz II of Żagań (Sagan), destroyed the castle to prevent his enemies from using it.
In 1526 it became part of the Habsburg Empire and experienced a wave of witch trials in the 17th century.
As a result of the First Silesian War, Zielona Góra was annexed by Prussia and remained in Germany until the end of World War II in 1945.
Catholic Poles were later discriminated against, however.
The city's textile industry was booming by the end of the 18th century, and by 1800 large parts of the city walls had been dismantled to allow the city to expand.