page_title: Rundetaarn
section_title: Demise and later years
hierarchical_section_title: Rundetaarn / History / Demise and later years
caption_attribution_description: English: One of Anton Rosen's renderings made in connection with his proposal to move Rundetårn in Copenhagen, Denmark
context_page_description: The Round Tower, formerly Stellaburgis Hafniens, is a 17th-century tower located in central Copenhagen, Denmark, and one of the many architectural projects of Christian IV of Denmark, built as an astronomical observatory. It is most noted for its equestrian staircase, a 7.5-turn helical corridor leading to the platform at the top, and for the expansive views which it affords over Copenhagen.
  The tower is part of the Trinitatis Complex which also provided the scholars of the time with a university chapel, the Trinitatis Church, and an academic library which were the first facilities of the Copenhagen University Library which had been founded in 1482. Today, the Round Tower serves as an observation tower for views of Copenhagen, a public astronomical observatory, and a historical monument. The Library Hall above the church is only accessible along the tower's ramp and is a venue for exhibitions and concerts.
context_section_description: in connection with his proposal to move the tower to a position next to the church]] 
   
  During the early 19th century, the Round Tower became outdated as an astronomical observatory. Instruments were growing still larger while the tower could not be expanded and, at the same time, light pollution from the surrounding city and vibrations caused by the ever increasing traffic in the streets below had made the observations inaccurate.  The University therefore decided to build Østervold Observatory on the old bastioned fortifications of the city, which had become outdated and were being decommissioned. The new observatory was inaugurated in 1861 to the design of Christian Hansen.
caption: Rendering made by Anton Rosen in connection with his proposal to move the tower to a position next to the church
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