In the 1970s, construction of the metro station caused much controversy since the plans called for the old elms to be cut down, which led to violent protests and a tree-hugger campaign on May 12-May 13, 1971 with people chaining themselves to the trees, the so-called Battle of the Elms. Eventually these protests not only saved the trees and caused the station entrances to be located east and west of the park, but they also marked the end of a period when many old buildings in central Stockholm were demolished.