While trying to find our way from Rosenborg to Amalienborg, we happened upon Rundetarn or the Round Tower.
This actually the church-side view.
Rundetarn is a 17th-century tower and is another of Christian IV's many architectural projects and was originally built as an astronomical observatory.
I'm not sure what these niches are for.
It is most noted for its 7.5-turn helical corridor leading to the top, and for the expansive views it affords over Copenhagen.
In 1726, The Czar Peter the Great ascended the corridor on horseback!
In 2011, Steve and I as well as Kathryn and Dave ascended and descended the corridor on foot!