The JenTower is a
skyscraperin Jena, Germany.
The tower has been known by many names, official and unofficial. Until January 2005, the tower was called the "Intershop Tower" after its principal tenant,
Intershop Communications AG. On November 30, 2004the building was renamed the JenTower. Until 1995 the building was used by the Friedrich Schiller University of Jena, and therefore it is still colloquially known as the University Tower.
Further unofficial names include
PhallusJenensis, CookieRoll (Keksrolle), or the Henselmann tower, after the architecht Hermann Henselmann.
Buildings in vicinity
The JenTower stands directly opposite to the so-called Building 15, which was the first German multistoried building. Building 15 was erected in to a height of 43 meters in 1915, based on plans by the architect
Friedrich Puetzer(1871-1922). Other buildings in the neighborhood are Building 36 (today seat of the Jenoptik AG) and Building 59 (Carl ZeissJena Research building), likewise designed by Henselmann.
architectof the tower was Hermann Henselmann, one of the most famous architects of the former German Democratic Republic. The idea of a monolithic tower as an "Urban crown" was developed by Bruno Taut, who was city architect in Magdeburgin the 1920s.
Construction began in June 1969, in a residential and business quarter spared by the
Second World War. The foundation stone was laid on April 30, 1970. Construction took place in sliding scarfbuilding method, and was completed on October 2, 1972at the original height of 127 meters. The circular tower is a reinforced concreteconstruction with 2 basements, 3.20 m thick mat foundation and a diameter of 33 meters.
In 1999 the building was sold to an investor, who completed a modernization in 2001. At this time, two additional floors and a
UMTSantenna were added, and the 28th and 29th floors were converted into a restaurant. At 30 floors and 159 meters, including a spireof 37 meters, the building is the tallest in Eastern Germany, and the ninth-highest in Germany.
Jen-Tower was originally planned as office building for the collective combine Carl Zeiss Jena, but was never used for this purpose. When the building was used by the Friedrich Schiller University of Jena, the base of the tower housed the
refectoryof the university.
There is a persistent
rumorthat original plans included an identical twin tower, which was to be connected with a bridge and binocularsas a symbol for Jena's optical tool-making industry. However, investigations by historians of the Friedrich Schiller University Jena at the beginning of the 90's did not confirm this rumor.
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