Rundetårn
Observation Decks & Towers
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About
The Round Tower Lookout Tower – Observatory – Exhibitions – Concerts.One of the best-known and most popular structures in Denmark, the Round Tower has been a distinctive feature of the Copenhagen skyline since 1642. The Tower once soared far above the rest of the rooftops in the city, and University astronomers studied the stars and planets from the Observatory at the top. The scholars may have forsaken the building a long time ago, but during the winter visitors are still able to gaze at the cosmos from Europe's oldest functioning observatory. The platform that runs around the outside of the Observatory affords views over the old Latin Quarter – from here, you can spot most of the city's famous buildings. The Round Tower does not have an elevator, so visitors have to climb the winding, white-washed Spiral Walk, where kids often hide in the niches, only to jump out shouting “boo!” as adults approach. Halfway up the tower is the entrance to the large and stunningly beautiful Library Hall, which now serves as a popular gallery and concert venue. It hosts several exhibitions a year, and stages concerts almost every week. Above the Library is the Bell Loft, notable for its enormous wooden beams, which were used in the reconstruction of the Tower following the great fire of Copenhagen in 1728. The Loft is also home to a small exhibition of fascinating artefacts from the Tower's history, including Christian IV's wax seal, a tin of medicine produced by Tycho Brahe, and a piece of the bomb that exploded in the Library Hall during the bombardment of Copenhagen in 1807.The Round Tower was built by Christian IV between 1637 and 1642. It was the first part of the Trinitatis Complex, which combined church, library and observatory in a single building.
Suggested duration
1-2 hours
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The area
Address
Neighborhood: Indre By (Inner City)
This is the heart of old town Copenhagen, with its blend of charming old buildings and bold new architecture, broad avenues and tiny streets as well as picturesque canals and a modern harbor. The inner city is home to the Royal Danish Theatre, which consists of three buildings, two of which are new and situated on the harbor front. The streets, squares and venues of the inner city and its surrounding neighborhoods, are alive all year round with everything from jazz festivals to outdoor ice skating rinks and parachuting at the lakes right in the center of the city. This compact area boasts beautiful old castles, tranquil parks, and bustling squares where you can always find a bench to stretch out your legs whenever you need a break.
How to get there
  • Nørreport • 5 min walk
  • Kongens Nytorv • 8 min walk
Detailed Reviews: Reviews order informed by descriptiveness of user-identified themes such as cleanliness, atmosphere, general tips and location information.
Popular mentions

4.5
7,782 reviews
Excellent
3,540
Very good
3,240
Average
923
Poor
69
Terrible
10

Jana C
Prague, Czech Republic4,619 contributions
Christian IV built the tower in the 17th century to continue Tycho Brahe's research. There is a planetarium which lets you see planets as they are atm. To start with it was done according to Tycho Brahe but later on changed to Sun centred system.
We loved the fact you can walk up not using stairs but the round ramp, stairs were only to the very top using the traffic light system to let people go up or down. The cost was 40 DKK for adults and 10 DKK for 5-15 year olds.
Written July 30, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

Roslyn138
Wrexham, UK579 contributions
On the way back to our shuttle bus , with time to spare we went to the Round Tower . admission for two was around £9. It was interesting walking up the spiral ramp - half way up there is the Library Hall which had an art exhibition . Near to the Library you can also see the Old Privy which was built around 1642....In 1865 it was reported that it hadn't been cleaned for 50 - 60 years !!
However you can get to the observation tower and get a 360 degree view of the city. Because the final steps are very narrow, they have a traffic light system , that gives you 90 sec to get to the top ! same applies to get down - bit of a race if you have a number of people in front of you.
Its an unique building and worth a visit.
Written June 1, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

AG
Prince William County, VA68 contributions
After a 6 day whirlwind tour through Copenhagen, I can say that Round Tower had, by far, the best views experienced. Worth 2x the price of admission (probably one of the few in Copenhagen that charges less than I'd be willing to pay!)

Go in the afternoon on a sunny day for the nice shots of Marble Church and Rosenborg and Nikolas Church. Go in the mornings for the best views of City Hall and south City Center. We went in the late afternoon and only the first half mentioned had good lighting.
Written September 5, 2021
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

Feeks
Stirlingshire, UK146 contributions
The Round Tower is exactly what is says on the tin, it is a round tower with views from the top on an outside balcony. What makes this tower different is that it has a ramp for the majority of the way up rather than stairs. In fact the only stairs are the short narrow set near the top to reach the balcony which are operated by a stop and go light system. This can cause a short queue in the busier seasons but it wasn't too long to wait. It is around £4 to enter for adults, an easy climb to the top and well worth a short visit.
Written July 29, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

Brian T
London, UK6,344 contributions
Located on one of Copenhagen’s busy shopping streets, The Rundetaan (Round Tower) is a prominent landmark in the heart of Copenhagen’s old town area. Christian IV built the tower in the early 17th century at a time when Denmark was famous for its astronomical achievements thanks to the astronomer Tycho Brahe. After Brahe's death in 1601, the King built the tower as a way to continue Brahe's research. The foundation stone was laid on July 7, 1637, and five years later the Round Tower was finished as the first part of the Trinity Complex, which was designed to accommodate three things: the observatory at the top of the tower, the university library above the Trinity Church and the church itself below.

Today, the observatory is still used by amateur astronomers and many visitors and is the oldest functioning observatory in Europe. It's right at the top of the tower, accessed via a spiral walk. The observatory is encircled by an outdoor platform offering rooftop and church steeple views over Copenhagen.

It’s a relatively easy walk to the top. There’s a wide and quite distinctive spiral ramp which gently winds its way to the top; The ramp has 7.5 loops to the top; it’s only when you get near the top that you have to climb a short set of stairs to access the observation deck. Along the way there’s an entrance to what was once a grand library hall which housed the entire book collection of the library, and which was frequented by Hans Christian Andersen. It's now an exhibition space hosting displays of art, culture, history, and science. You’ll also see an old toilet which was incorporated into a niche in the wall. A ramp, rather than stairs, was built to allow the easier transportation of the heavy and sensitive astronomical instruments to the top.

As the towers only 34.8 metres tall, you are not going to get soaring views of the city of Copenhagen. You can walk right around the viewing dock for a 360 degree sweep of the rooftops and steeples of the city. The city views are pleasant, but in my opinion not remarkable. There’s a lot you can’t see because of the height of the tower, for example, the Nyhavn.

It’s worth a visit, and is easily located on Købmagergade 52A. It’s on a major shopping street which crosses Copenhagen’s other main shopping street, Lille Kongensgade (the main thoroughfare which leads down to Nyhavn).
Written September 22, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

Joyman L
Perth, Australia1,369 contributions
Located off a side street from Stroget, the Round Tower, a 17th century astronomy tower has interesting interior architecture. The tower is attached to the beautiful Trinitatis Church, however ticketing is only valid for visiting the tower. We visited ticket-free as part of our Copenhagen Card.

In addition to the viewing platform at the top, entry ticket to the round tower includes a visit to an exhibition hall (space exploration theme was on during our visit), another hall showcasing the brief history and architecture of the building and a look at an old toilet for the round tower. There were some stairs towards the top but otherwise the whole tower is "sloped".

Free toilets and small souvenir shop inside the tower.
Written February 20, 2020
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

Mikael F
Helsinki, Finland26,575 contributions
The Round Tower is a 34.8-meter high tower built as an astronomical observatory. It was completed in 1642. Inside the tower is one of the oldest observatories in Europe and the oldest one still in operation.

The top of the tower, where the observatory and the small planetarium are located, is not led by stairs, but by an original spiral corridor.

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.

Today, the Round Tower serves as an observation tower for panoramic 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.
Written August 10, 2022
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

Josh Formentera
Copenhagen, Denmark596 contributions
Solo
Nice to experience to see inside the tower. It's 17th century tower located in the city center in Copenhagen and its iconic building which houses exhibition experience and the tower attached to a nice church. It takes a 3 minute walk to the top. There is nothing much fancy to see around and if you want to see the nice view of Copenhagen from above coupled with the nice sunset, this place a must to see. The entrance cost 40kr per adult. The place open at 10:00 and closes 20:00 pm during summer. From October to March open at 10:00 and closes at 18:00 and its open everyday except Christmas holidays.
Written August 31, 2020
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

permia
Ireland37,875 contributions
It’s a tremendous legacy from Christian IV’s ambitions for a grand city to rival any in Europe.

With its marvellous equestrian helical stairway, that was ascended on horseback by many including Peter the Great of Russia, and which once mounted, brings fine panoramas of the cityscapes.

It was planned by the King, not only for observing the skies but most importantly to advance navigation by sea to hoped-for territories and colonies.

Walking along the unique sloping stairway of brick was a memorable experience. Getting the green light for the final segment it was exciting to see the lovely sights spread in front and identifying landmarks.

A low-lying city, its most notable and impressive feature is the multitude of great church spires.
Written November 3, 2021
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

EmeraldDiva
Victoria, Australia3,441 contributions
We went up in the evening on a night when the observatory at the top was open. The tower itself is interesting having a ramp instead of lots of steps. There is a small display room off to one side that shows the construction, the enormous beams.
Copenhagen is not the prettiest city to view from up high and it is not a great place for night views either, but when open, you can visit the observatory.
It was a nasty night and so cloudy that the volunteers did not even open the dome, but it was still great to get in there and see such a tiny observatory and how it all works. The volunteers were enthusiastic about answering questions.
There is no extra cost for the observatory, so it is well worth timing your visit for when it is open.
Written March 14, 2020
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews.

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