The Rundetårn (Round Tower) is a 17th-century tower located in central Copenhagen. One of the many architectural projects of Christian IV, it was built as an astronomical observatory. It is most noted for its 7.5-turn helical corridor leading to the top, and for the expansive views it affords over Copenhagen.

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 was the first purpose-built facilities of the Copenhagen University Library which had been founded in 1482.

Today the Round Tower serves as an observation tower for expansive views of Copenhagen, a public astronomical observatory and a historical monument. In the same time the Library Hall, located above the church and only accessible along the tower's ramp, is an active cultural venue with both exhibitions and a busy concert schedule.

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Founded: 1637
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Historical period: Early Modern Denmark (Denmark)

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User Reviews

Румяна Стоянова (8 months ago)
One of the most popular sights in Copenhagen. The tower was build by king Christian IV for observatory and a library. It offers great 360 degrees views to the city. The climb is easy - by a spiral ramp, only in the end there are some stairs. The observatory at the top is open in the winter.
Rolf kivisalu (9 months ago)
Neat place with a great view of the city from the observation deck. There was an exhibition with a space theme when we were there. There are a few nice surprises on different floord. Well worth the visit.
Rolf kivisalu (9 months ago)
Neat place with a great view of the city from the observation deck. There was an exhibition with a space theme when we were there. There are a few nice surprises on different floord. Well worth the visit.
Maryla Scotlery (10 months ago)
Great views of Copenhagen all round and good information regarding the history of the tower as it stands today. This was a fun experience. A must to visit while in Copenhagen.
Martin Thomsen (10 months ago)
Unique place. Must see
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Trinity Sergius Lavra

The Trinity Lavra of St. Sergius is a world famous spiritual centre of the Russian Orthodox Church and a popular site of pilgrimage and tourism. It is the most important working Russian monastery and a residence of the Patriarch. This religious and military complex represents an epitome of the growth of Russian architecture and contains some of that architecture’s finest expressions. It exerted a profound influence on architecture in Russia and other parts of Eastern Europe.

The Trinity Lavra of St. Sergius, was founded in 1337 by the monk Sergius of Radonezh. Sergius achieved great prestige as the spiritual adviser of Dmitri Donskoi, Great Prince of Moscow, who received his blessing to the battle of Kulikov of 1380. The monastery started as a little wooden church on Makovets Hill, and then developed and grew stronger through the ages.

Over the centuries a unique ensemble of more than 50 buildings and constructions of different dates were established. The whole complex was erected according to the architectural concept of the main church, the Trinity Cathedral (1422), where the relics of St. Sergius may be seen.

In 1476 Pskovian masters built a brick belfry east of the cathedral dedicated to the Descent of the Holy Spirit on the Apostles. The church combines unique features of early Muscovite and Pskovian architecture. A remarkable feature of this church is a bell tower under its dome without internal interconnection between the belfry and the cathedral itself.

The Cathedral of the Assumption, echoing the Cathedral of the Assumption in the Moscow Kremlin, was erected between 1559 and 1585. The frescoes of the Assumption Cathedral were painted in 1684. At the north-western corner of the Cathedral, on the site of the western porch, in 1780 a vault containing burials of Tsar Boris Godunov and his family was built.

In the 16th century the monastery was surrounded by 6 meters high and 3,5 meters thick defensive walls, which proved their worth during the 16-month siege by  Polish-Lithuanian invaders during the Time of Trouble. They were later strengthened and expanded.

After the Upheaval of the 17th century a large-scale building programme was launched. At this time new buildings were erected in the north-western part of the monastery, including infirmaries topped with a tented church dedicated to Saints Zosima and Sawatiy of Solovki (1635-1637). Few such churches are still preserved, so this tented church with a unique tiled roof is an important contribution to the Lavra.

In the late 17th century a number of new buildings in Naryshkin (Moscow) Baroque style were added to the monastery.

Following a devastating fire in 1746, when most of the wooden buildings and structures were destroyed, a major reconstruction campaign was launched, during which the appearance of many of the buildings was changed to a more monumental style. At this time one of the tallest Russian belfries (88 meters high) was built.

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In 1993, the Trinity Lavra was inscribed on the UNESCO World Heritage List.