Astronomical observatories in Denmark

thumb|right|320px|Tycho Brahe's Uraniborg from Blaeu's Atlas Maior (1663) thumb|right|320px|Tycho Brahe's Uraniborg main building from Blaeu's Atlas Maior (1663)

The Round Tower () is a 17th-century tower in Copenhagen, Denmark, one of the many architectural projects of Christian IV. Built as an astronomical observatory, it is noted for its equestrian staircase, a 7.5-turn helical corridor leading to the platform at the top (34.8 meters above ground), and its views over Copenhagen.

observatory

thumb|right|330px|Drawing of an above-ground view of Stjärneborg thumb|right|330px|Stjärneborg as it exists today

former astronomical observatory of the University of Copenhagen in Denmark

astronomical observartory in Aarhus, Denmark