Zielona Góra [ʑeˈlɔna ˈɡura] (German: Grünberg in Schlesien) is the largest city in Lubusz Voivodeship, in western Poland, with 138,512 inhabitants (2015).
Zielona Góra has been in Lubusz Voivodeship since 1999, prior to which it was the capital of Zielona Góra Voivodeship from 1950 to 1998. It is the seat of Lubusz Voivodeship's elected assembly (sejmik) and executive (the seat of the centrally appointed governor or voivode being Gorzów Wielkopolski). The city's name, in Polish, and German, means "green mountain".
The first settlement in the area of Zielona Góra was built in the valley near the Złota Łącza stream during the reign of Polish ruler Mieszko I. The oldest settlement was agricultural and later developed into a trading point along routes from Poznań to Żagań and further to Łużyce. The written records of the Slavic settlement date to 1222 and an increase of its population by Henryk Brodaty. Other documents date the settlement to 1302.
The region received influx of German burghers in the second half of the 13th century during the medieval Ostsiedlung. The settlement became a city with Crossener Recht, a variation of Magdeburg rights, in 1323. The earliest mention of the town's coat of arms is from 1421, although it is believed to have been arranged since the beginning of the 14th century. A document in the town archive of Thorn (Toruń) dating from before 1400 used a sigil with the name GRVNINBERG, an early form of the German name Grünberg.
In 1294, Duke Henryk III of Głogów, founded a church in honour of Saint Hedwig, patron saint of Silesia. This building, today called the konkatedra św. Jadwigi w Zielonej Górze, is the oldest building in the city. A wooden castle near the city, built ca. 1272, was the residence of Duke Janusz of Ścinawa from 1358 to 1365; Janusz had ceded his lands to Duke Henryk III of Głogów. In 1477 the town defeated a 5,000-strong army from neighbouring Brandenburg which attempted to seize it during the succession war to the Duchy of Glogau. In 1488, Duke Janusz II of Żagań, destroyed the castle to prevent his enemies from using it.
After the collapse of the Duchy of Sagan, the town fell to the Kingdom of Bohemia, a state of the Holy Roman Empire. Grünberg converted to Lutheranism during the Protestant Reformation through the efforts of Paul Lemberg, Abbot of Sagan. The city declined during the 17th century, especially during the Thirty Years' War (1618–48) and following decades. Grünberg endured plundering, debts, emigration of burghers, and fires. In 1651 during the Counter Reformation, the Habsburg Monarchy of Austria reintroduced Roman Catholicism and suppressed Protestantism. The city was subjected to heavy Germanisation and German craftsmen banned Poles from attending any practice allowing them to work as members of guilds. A rebellion caused by conscription ended with many Poles being imprisoned.
The city was annexed by the Kingdom of Prussia by the 1742 Treaty of Breslau which ended the First Silesian War. The Prussians introduced religious toleration, leading to the construction of the Protestant parish church Zum Garten Christ from 1746 to 1747; 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. The textile industry suffered during the 1820s while adjusting to the Industrial Revolution and an import ban by the Russian Empire. The city's economy began to recover after many clothiers emigrated to Congress Poland.
During industrialisation, many Germans from the countryside moved to large industrial cities and a large number of Poles came to German cities to work as well. The Polish population was pushed by Germanisation to rural villages, although some remained in the town contributed to the economic revival of the city. A Polish church remained functional until 1809 and a Polish craftsmen association (Towarzystwo Polskich Rzemieślników) was established by Kazimierz Lisowski in 1898, it existed till 1935 when Lisowski was murdered by Gestapo.
Since 1816 after the Napoleonic Wars, Grünberg was administered within the district Landkreis Grünberg i. Schles. in the Province of Silesia. In 1871 it became part of the German Empire during the unification of Germany. English industrialists purchased some of the city's textile factories during the 1870s and 1880s. By 1885, most of Grünberg's population of 14,396 were Protestants. The city was first connected to the Glogau-Grünberg-Guben railway line in 1871, followed by connections to Christianstadt in 1904, Wollstein in 1905, and a local line to Sprottau in 1911.
In 1919, Grünberg became part of the Province of Lower Silesia within Weimar Germany. 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. In that course, about 500 people committed suicide. The following month, the town was placed under Polish administration, followed by the post-war Potsdam Agreement. The remaining German inhabitants who had not fled from the Eastern Front were expelled by Soviet troops, and the town was partly resettled with Poles transferred from Polish areas annexed by the Soviet Union. The city was officially renamed from the German name Grünberg to the Polish name Zielona Góra — both of which mean "Green Mountain" — and the 18th-century Protestant church was reconsecrated as a Catholic church (Kościół Matki Boskiej Częstochowskiej).
The University of Zielona Góra was opened in 2001. The city is also the seat of the Roman Catholic Diocese of Zielona Góra-Gorzów.
The city has been known for its wines for centuries. It is now one of two places in Poland with wine grape cultivation mainly for white wines (the other being the wine growing region near the town of Warka in Masovia). The first wineries around the city were built in 1314. At Paradyż (Paradise) Abbey near Zielona Góra, monks have been making wine since 1250. The number of vineyards at peak production is estimated at 4,000 in the region, and 2,500 in Zielona Góra itself. During the communist era wine production was reduced, but since 1990 it has recovered. Since 1852 an annual Wine Festival has taken place in the town. However, nowadays wine is no longer produced in Zielona Góra itself (the last factory was closed in the early 1990s).
Vodka Luksusowa (namely: Luxury vodka), made from potatoes rather than grain, is produced in distillery in Zielona Góra.
The city has a university and a College of International Trade and Finance. Currently there are 18,000 students studying in the city.
Secondary education is based on the High School type of educational facility.I High School
III High School
IV High School
V High School
seventh General Lyceum
Schools of Electronics
Schools of Economics
University of Zielona Góra 
College of International Trade and Finance
Members of Parliament (Sejm) elected from the constituency: http://www.sejm.gov.pl/poslowie/mapa5/4a.htm
Zielona Góra Airport is located at Babimost, north-east of the city. It is currently the eleventh busiest airport in Poland, in terms of traffic size. Formerly a military base, it has become an important transport hub for western Poland. SprintAir currently offers daily flights to Warsaw.
Zielona Góra has a few connections to Gorzów Wielkopolski, Zbąszynek, Rzepin, Warsaw, Frankfurt (Oder) and Berlin and main cities of the surrounding regions: Poznań, Szczecin and Wrocław.June/July: Busker Bus Festival
August: Folk Song and Dance Festival Folk Festival
September: Winobranie (Wine Fest)
Zielona Góra is twinned with:Bartholomaeus Pitiscus (born 1561; died 1613), mathematician, theologian, astronomer
Abraham Scultetus (born 1566; died 1625), theologian
Rudolf Haym (born 1821; died 1901), philosopher
Wilhelm Foerster (born 1832; died 1921), astronomer
Otto Julius Bierbaum (born 1865; died 1910), writer
Franz Mattenklott (1884–1954), general
Prince Franz Wilhelm of Prussia (born 1943) great-grandson of Kaiser Wilhelm II.
Maryla Rodowicz (born 1945), singer
Jürgen Colombo (born 1949), bicyclist
Olga Tokarczuk (born 1962), journalist
Tomasz Lis (born 1966), journalist
Mariusz Linke (born 1969), mixed martial arts fighter and world-class grappler
Grzegorz Halama (born 1970), comedian
Piotr Protasiewicz 1975, Speedway Rider
Grzegorz Luzynski (born 1984), Polish-Dutch hardstyle-dj and producer
Grzegorz Zengota 1988, Speedway Rider
Renata Thiele, German writer