text:  Many of the residents ' original grievances were addressed with the passing of the Local Government ( Northern Ireland ) Act , 1972 , which redrew the electoral boundaries and introduced universal adult suffrage based on the single transferable vote . Elections were held in May 1973 . Nationalists gained a majority on the council for the first time since 1923 . Since then the area has been extensively redeveloped , with modern housing replacing the old houses and flats . The Free Derry era is commemorated by the Free Derry wall , the murals of the Bogside Artists and the Museum of Free Derry . 
  