The Round Tower (Rundetårn) is the observatory within the university campus, which was erected at the Copenhagen Trinity church upon the order of king Christian IV in the middle of the 17th century. Denmark may be proud that one of the most prominent figures of the Renaissance, Danish astronomer Tycho Brahe worked in the observatory of "Heavenly castle" on the small Danish island Ven.
There Tycho Brahe was among the scientists doing their research. However, once based on the money issue he quarrelled with king Christian IV. The king needed money to implement all his architectural projects, whereas Tycho Brahe also needed money to do his research work. As a result, falling out with the king, Tycho Brahe got offended and left for Prague. And here Christian IV had the idea to build the Round Tower, with the observatory on the top floor. The construction period was from 1637 to 1642. The Observatory in the tower is one of the oldest in Europe. With time the tower turned into one of the symbols of the Danish capital. In the literary fairy-tale "The Tinderbox" by Andersen it is said that the biggest dog has the eyes the size of the Round Tower.
Address: Købmagergade 52A, Copenhagen
Web: Round Tower
Open hours: every day in summer from 21 May to 20 September from 10 am till 8 pm. Every day from 21 September to 20 May, except Sundays from 10 am till 6 pm.
Observatory open hours are variable. Read more about it here.
Admission: adults 20 DKK, children up to 15 years 5 DKK.
The top level of the tower that has the height of 36 meters is occupied by the Observatory. There are no stairs inside. The gentle rampant twists the tower 7.5 times and leads to the viewpoint. The length of the spiral rampant is 210 meters. Owing to this design the observatory could be accessed by carts and equestrians. In 1902 an automobile got to the top of the Round tower for the first time. On the upper wall of the tower four gilded Jewish letters symbolizing the Sacred name were carved.