The JenTower's a skyscraper in Jena, Germany. Common names 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, 2004, the building was renamed the JenTower. Until 1995 the building was used by the Friedrich Schiller University of Jena, and therefore it's still colloquially known as the University Tower. Further unofficial names include Phallus Jenens… (More on Jen-tower)