For ten nerve-wracking minutes on Monday, the Round Tower's green copper dome hovered above the ground in the Danish capital.
Once the dome was safely on the ground, a crowd gathered to witness the historic lowering and applauded.
The Round Tower, built in the 17th century, is Europe's oldest functioning observatory. Today, it is one of Copenhagen's most well-known and visited landmarks.
The restoration of the dome, as well as work on the almost 100-year-old telescope and new floors, is expected to last about six months. In the meantime, the tower will remain partially closed to visitors.
The renovation is estimated to cost six million Danish kroner.
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