The Round Tower was built in 1642 under the orders of King Christian IV of Denmark as an astronomical observatory and part of the Trinitatis Complex (which combined a church, a library, and the observatory in a single building). The tower is 115 feet (35 meters) tall and has an observation deck at the top and a hollow core.
Visitors can ascend the tower by walking up a spiral ramp that offers views of the city from windows at different heights. Halfway up the ramp, you’ll find the entrance to the old university library, where the writer Hans Christian Andersen sought inspiration for his fairytales; it now serves as a gallery and concert venue. At the top of the tower is an observation deck with sweeping views of the old city and a glass floor that allows you to see into the building’s hollow core.
Things to know before you go
- Entry to the Round Tower is by paid ticket, but admission is included on a Copenhagen Card, which allows visitors to see multiple attractions across the city for one discounted price.
- The tower does not offer an elevator, so visitors must use the ramp to reach the top.
- Visitors can see a 3D model of the solar system and use a telescope in the tower; plan to visit at night if you want to study the stars.
How to get there
The tower is located at 52a Kobmagergade, in Copenhagen’s Old Town. The Norreport metro station is close by, and many walking tours of the city stop here.
When to get there
The Round Tower is open daily, but opening times vary throughout the year, with longer hours from April until the end of October.
A trip to the Round Tower can be combined with a visit to the nearby Tivoli Gardens. Built in the 1840s, this attraction is the second-oldest amusement park in the world and includes modern roller coasters, such as the Demon; gentler rides, like the ornate carousel; landscaped gardens; and restaurants.
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- Torvehallerne Market
- Rosenborg Castle (Rosenborg Slot)
- David Collection (Davids Samling)
- Rosenborg Castle Gardens (Kongens Have)
- Thorvaldsens Museum
- Christiansborg Palace (Christiansborg Slot)
- Ruins under Christiansborg Palace
- City Hall Square (Radhuspladsen)
- National Museum of Denmark (Nationalmuseet)
- Ocean Quay Cruise Port
- Castle Islet (Slotsholmen)
- Kunsthal Charlottenborg
- Old Stock Exchange (Børsen)