King Frederik Reopens Europe's Oldest Observatory During 2026 Solar Eclipse
King Frederik X of Denmark reopened the Round Tower People's Observatory in Copenhagen on 12 August 2026, timing the ceremony to coincide with a partial solar eclipse visible across the city.
The Round Tower, built in 1642, is Europe's oldest functioning observatory building. It had been closed for six months while its dome and telescope underwent extensive renovations. Frederik, 58, marked the reopening by leading a public solar eclipse viewing — donning eclipse glasses alongside visitors gathered at the tower and at an organised viewing on the rooftop terrace of Cinemateket, the Danish Film Institute's cinema, where astronomers were on hand (Round Tower).
The eclipse on Wednesday 12 August was a partial one over Denmark, but its reach was far wider. In the United Kingdom, more than 90 per cent of the sun was obscured between roughly 6pm and 8.15pm — the greatest blockage since the total eclipse of 1999. Spain experienced a rare total solar eclipse, though King Felipe and Queen Letizia were in Mallorca for their summer holiday rather than on the path of totality. King Charles was in Scotland during the event and may have missed the best of the view (Hello! Magazine).
Queen Mary was not at Frederik's side for the reopening. She was travelling home from the World Equestrian Championships in Aachen, Germany, where she had met Princess Amalia of the Netherlands and Infanta Elena of Spain (Hello! Magazine).
The eclipse marked the close of the Danish royal couple's summer holiday. Frederik and Mary had boarded the Royal Yacht Dannebrog on 6 May for their annual summer cruise around Denmark, which concluded with a visit to Holbæk Municipality on 4 June. Frederik is set to resume his regular audiences on Monday 17 August, bringing the royal household back to its official agenda (Hello! Magazine).
What makes the moment striking is the collision of three time scales. A 17th-century observatory, reopened after half a year of work, pointed its renovated telescope at an event choreographed by the orbits of the Earth and Moon. And a king, finishing his summer break, stood on the tower's platform and looked up with the rest of Copenhagen.
