Over 80 barriers and peace lines have been erected in predominantly urban, working class, loyalist and republican communities across the north of Ireland. In total they stretch over 21 miles (34km), with most located in Belfast. Discussions regarding their removal are ongoing.
For further information on the background to the peace walls, see Attitudes to Peace Walls from the University of Ulster and Office of the First Minister & Deputy First Minister.
For further information on the history of the Troubles and source materials on events such as the 1969 riots, see Conflict Archive on the Internet from the University of Ulster.