Kastellet was designed concerning 1662 and 1725 and was a cornerstone of King Christian IV’s defenses of Copenhagen. It remains in use by the army and inside of there are actually long, purple brick, slate-roofed buildings, a parade ground, and perhaps a Dutch-model windmill. It is located in Ørestad near https://agency-social.com/story2494966/the-5-second-trick-for-things-to-do-copenhagen-winter