Walking derrys historic walls will take you around 14 km 087 miles of one of the best preserved walled cities in europe built in 1613 the walls are utilised in telling the history of derry starting in the monastic period 6th century the history of derry unfolds nine years war plantation of ulster 1641 rebellion siege of derry 1689 1798 rebellion the great hunger and more this tour offers you 90 minutes of irish history explored and explained