Between February 7 and March 21, Rundetaarn invites you to an astro festival in Christian IV’s stargazing tower on Købmagergade. Framed by an exhibition featuring spectacular photos by one of Denmark’s best astrophotographers, the program also includes scientific talks, concerts, special events, and other stellar moments for both children and adults—all with the cosmos in focus.

Did a car really drive up the Round Tower’s Spiral Ramp? How often did famous fairy tale writer Hans Christian Andersen visit the tower? Immerse yourself in our audio stories, and find out.

Visit the tower from home with our virtual tour. Here, you can move up the Spiral Ramp, scope out the current exhibition in the Library Hall and marvel at the 360 degree view of Copenhagen’s rooftops.

Apply for an exhibition period in 2026.

Prams, guide dogs, wheelchairs and luggage. Read more about the practicalities before your visit to the Round Tower.