Berlin Wall Monument (Chicago) described the effects of the wall and its ultimate fall by arguing that "It became the landmark that symbolized the Cold War… the Berlin Wall also left a lasting impression on the psyche of the German people". She further argues that The Berlin Wall "provides a salient and powerful example of how material culture intersects with knowledge production in the psychological sciences". Since the fall of the Berlin Wall on 9 November 1989, fragments of the Berlin Wall have been donated to various cities in the world. Chicago was offered a piece of the wall in 2008 by the German
Heddon-on-the-Wall where the name means 'Hidda's pasture'. A Roman milecastle ('Milecastle 12') was located at the site of the present-day village, under what is now Town Farm, but no traces of it are currently visible. Prior to the 1960s, Heddon-on-the-Wall was a small village with an economy based strongly on traditional industry including farming and coal mining. Large-scale coal mining close to the village began in the late 1950s with the opening of the Bays Leap, a opencast mine site located a short distance north of Heddon-on-the-Wall. The site supported seven coal seams at its peak, and evidence was found of