Kastellet was constructed between 1662 and 1725 and was a cornerstone of King Christian IV’s defenses of Copenhagen. It remains to be in use by the army and within there are very long, pink brick, slate-roofed buildings, a parade floor, and in some cases a Dutch-fashion windmill. → Bought only https://geniusbookmarks.com/story17163186/things-to-do-copenhagen-today-no-further-a-mystery