The Fortification Ring (Danish: Fæstningsringen) in Copenhagen, Denmark, is a collective name used to refer to the grounds where the city's old 17th-century fortifications used to lie, now surrounding the City Centre.[1] Since the fortifications were decommissioned in 1870, the Fortification Ring has been dominated by a number of parks and distinctive greenspaces and it is still maintained and developed as a green belt within the city limits, running between the city centre and the -bro districts.[2] The ramparts, bastions and moats of the former fortifications are still clearly seen in the topography. At Christianshavn and the citadel Kastellet, the fortifications have been preserved and remain intact.