Kastellet was built among 1662 and 1725 and was a cornerstone of King Christian IV’s defenses of Copenhagen. It continues to be in use by the army and within you'll find extensive, red brick, slate-roofed buildings, a parade floor, and in many cases a Dutch-style windmill. The city of Copenhagen, https://bookmarkzap.com/story17081564/the-basic-principles-of-things-to-see-in-copenhagen-denmark