Rundetaarn is a tower and visitor site that the venue describes as a Copenhagen landmark dating to 1642. Its programme page lists exhibitions in Bibliotekssalen, including titles on Ole Rømer and Light Echoes. The site also lists astronomy at the Observatory, including a chance to look through a telescope, as well as activities for children in Sneglegangen. Other programme formats named on the page include talks, performances and creative workshops. Individual listings have their own dates.

The venue says Rundetaarn is open 362 days a year. Its visitor information points to separate pages for opening hours and prices, so check those details before setting out. School groups can bring a class or book a group tour. The site presents the tower and church as part of the Trinitatis complex, and lists a special event about its history. Visitors can also consult the venue’s advice on things to know and access conditions before a visit.