 However, the idea was definitively abandoned by 1970, due to the high cost of the adaptation of the building.A new location was identified in 1977, in a building in the "Rua do Heroísmo", where the delegation of the former secret police PIDE/DGS used to be located between the 1940s up to 1974.In 1977, the Revolutionary Council, created after the Carnation Revolution of 25 April 1974, legislated the founding of the Museu Militar do Porto.