[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.
When an agreement fell into place in 1868, with effect from 1 January 1870, it stipulated that the City was required to use certain specified areas for green spaces.
An area was to be put at the disposal of the University of Copenhagen Botanical Garden and a minimum of 300,000 square ell (12 hectares) were to be laid out as public parks.
A master plan for the area was approved in 1872 and ground work proceeded, first at the Northern Rampart.
A revision of the master plan in 1885 increased the area to be laid out as parkland to 23.5 hectares.