The name comes from Giezzen, as it was first referred to in 1197, which refers to the position of the town between several rivers, lakes and streams.[citation needed] The largest river in Giessen is the Lahn, which divides the town in two parts (west and east), roughly 50 kilometres (31 miles) north of Frankfurt am Main. Giessen is also home to the University of Giessen.
In 1969, the town hosted the ninth Hessentag state festival.
In 1977, Giessen was merged with the neighbouring city Wetzlar to form the new city of Lahn. However, this attempt to reorganize the administration was reversed in 1979. It was part of the Darmstadt region (regierungsbezirk) between 1945 and 1981, until the Giessen (region) was founded on 1 January 1981.
A U.S. military base was located in Giessen after the Second World War. The U.S. Army Garrison of Gießen had a population of up to 10,000 American soldiers and their families. Gießen was also the site of the central US army depot for all of Europe as well as the site of a special ammunition depot.[8] The base is a converted German Army Air Field which is reflected in some of the buildings including the housing area. A theatre, known as the Keller Theatre, is a converted German Army Officers' Club. As of 28 September 2007, the Giessen Depot and all other U.S. facilities in the greater Giessen area were returned to local German authorities. The former U.S. Army buildings were used to house refugees after the large influx of 2016.
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Friedrich Kellner (1885–1970), Chief Regional Auditor in Giessen 1948–1950, and Chief Justice Inspector of Laubach, where he wrote his secret WWII diary. The Holocaust Research Unit of Justus Liebig University of Giessen has established the Kellner Project
Wilhelm Conrad Röntgen (1845–1923), physicist, professor of physics from 1879 until 1888 at the University of Giessen. He was buried at the "Alte Friedhof", where his tomb can still be found
Manisch is a dialect of rotwelsch spoken in and around Giessen by people in lower income neighbourhoods, some of which are known as "Eulenkopf", "Gummiinsel", "Heyerweg" and "Margaretenhütte". Approximately 700–750 residents spoke the dialect fluently as of 1976.[15] Although the dialect still influences the Giessen vernacular, it is nearly extinct in terms of fluent speakers.
Geography
Climate
Climate in this area has mild differences between highs and lows, and there is adequate rainfall year-round. The Köppen Climate Classification subtype for this climate is "Cfb". (Marine West Coast Climate).