The Round Tower
- Ideal for big groups
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Opening hours
Today10:00 – 20:00Show all
Shorts
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Why go
- The spiral ramp, 209 m long with seven and a half turns, is the only way up; there are no stairs.
- The observation platform, 34.8 m above street level, with views over the rooftops of the old part of Copenhagen.
- The planet machine on the wall above the ramp, which Ole Rømer installed in 1697.
- The concert in the Spiral Ramp on the shortest day of the year, where singer Sonja Strange climbs the spiral while performing.
- The permanent Ole Rømer exhibition on his discovery from Jupiter's moons that light has a finite speed; admission includes it.
What's inside
- The Library Hall above the Trinitatis Church, where a current exhibition is shown.
- The central cavity marks the kilometre zero of Denmark, set by Thomas Bugge; visitors stand in it and look down 25 m.
- A niche near the top opens onto the cavity, where a glass plate stops objects from falling.
- Another niche leads to the historic latrines; the tower once had two, one halfway up and one just below the roof.
- The waste container was emptied only in 1921, the equivalent of nine truckloads.
- At the top are a small planetarium and the oldest observatory in Europe still in use, with a refracting telescope giving 80 to 450 times magnification.
- Light Echoes, on Tycho and Sophie Brahe's 1572 Stella Nova, the new star of that year; it is included in admission.
- Ad Lucem, 40 works in a design that mirrors the tower's shape.
- Refractions of Ice, ice-core crystals taken from three kilometres deep in the Greenland ice sheet.
Tickets and box office
- Tickets can be bought online on the tower's own website.
- The tower is open every day from 10:00 to 20:00.
- The phone number is +45 33 73 03 73.
- The concert on the shortest day of the year needs no advance tickets: arrive on the day and pay the standard admission fee.
- Performances take place at 4:30 pm and again at 5:30 pm.
- Group tours are requested by email to [email protected] at least 14 days ahead, stating preferred date, time and group size.
- A group booking is final after email confirmation and can be cancelled free of charge up to 8 days before the tour.
- A private group tour can have at most 30 people in total.
- The office handles group tour booking, payment and invoicing.
- Group tours are paid for on site, after the tour.
With kids
- Family-friendly events run during 2026 alongside the exhibitions and concerts.
- A unicycle race is held in the tower every spring.
- Thomas Olsen rode a unicycle up and down the tower in 1 minute 48.7 seconds in 1989, a world record.
- Prams, guide dogs, wheelchairs and luggage are covered in the practical information before a visit.
Accessibility
- Step-free route to the top A wide ramp, paved with bricks laid on edge, replaces stairs.
- Lift to the top
- Virtual tour of the ramp Visitors can climb the Spiral Ramp and see Trinitatis Church online, with a 360-degree view over the rooftops.
Sources: Rundetaarn - Wikipedia · Copenhagen/Indre By - Wikivoyage (see) · Rundetaarn - A living landmark of Copenhagen si… · Guided Tours for Groups - Rundetaarn · The Hesitation of Light – a concert performance… · Rundetårn - Wikipedia · Rundetårn - Wikipedia · Rundetårn - Wikipedia · The Round Tower: tickets (its own site) · The Round Tower: description (its own site) · LIGHT YEAR 2026 - Rundetaarn · checked 18 Oct 2026
- Website
- rundetaarn.dk/
- Phone
- +45 33 73 03 73
Questions and answers
What are the opening hours of The Round Tower in Copenhagen?
The Round Tower is open every day from 10:00 to 20:00. Closures are listed at the top of rundetaarn.dk, so check there before you visit.
Where is The Round Tower in Copenhagen?
The Round Tower is at Købmagergade 52A, in the Indre By quarter of Copenhagen.
Can I buy tickets for The Round Tower in advance?
Yes, tickets can be bought online on the tower's own website. The concert on the shortest day of the year needs no advance tickets.
Is The Round Tower in Copenhagen suitable for children?
Family-friendly events run in 2026 alongside the exhibitions. The only way to the top is a 209 m spiral ramp with no stairs, and prams, guide dogs and wheelchairs are covered in the practical information before a visit.
Do I need to book a group tour of The Round Tower?
Yes. Group tours are requested by email to [email protected] at least 14 days ahead.
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