The 17th century tower and observatory Rundetaarn, or the round tower, is the oldest functioning observatory in Europe.

When Christian IV built the tower, Denmark was quite famous for its astronomical achievements thanks to the astronomer Tycho Brahe. When he died in 1601, the King wished to continue Brahe's research, and thus the round tower came into being.

It has been a while since the scientists left, but the observatory is still used by amateur astronomers and the many visitors. The observatory is encircled by an outdoor platform from which you have a magnificent view of the old part of Copenhagen.

To get there you need to walk up the spiral walk, which is 268,5 meters long at the outer wall and only 85,5 meters long close to the core of the building. This means that you walk around 209 meters to get to top even though the tower is only 36 meters tall.

The tower from inside

This walk also leads to the library hall, which once housed the entire book collection of the university. The famous Danish writer H.C. Andersen used to visit the library and he found inspiration for his work here. Today the hall serves as the framework for exhibitions of art, culture, history and science.

Floating glass floor

As a new attraction you can now see the tower's core by standing on a glass floor, hovering 25 meter above the ground. The glass is more than 40 cm thick and can carry up to 900 kg per square meter.

21 May – 20 September All days 10 – 20

21 Sep.- medio Oct. All Days 10-18

Medio October – medio March Mon., Thu. Fri., Sat. & Sun: 10 – 18 Tue. & Wed. 10 – 21

Medio March – 20 May All days 10 – 18

Closed 24 and 25 December and 1 January

Observatory opening hours:

2015

March 3 to March 18, every Tuesday and Wednesday 19-21.

Friday March 20, 9:30-12 We have a sun eclipse

June 28 to August 9, every Sunday 13-16, the Sun

Monday September 28, 4 (in the morning) to 5:30, total Moon eclipse

Admission Price

Adults:Admission - 25.00 DKK

Children:Admission - 5.00 DKK

Address: Købmagergade 52A, 1150 København K

Web: www.rundetaarn.dk

Email: post@rundetaarn.dk

Phone: +45 3373 0373

Fax: +45 3373 0377