Three nails from Coventry Cathedral (destroyed 14 Nov 1940) were bound into a cross. This became a symbol of worldwide reconciliation and peace after WW2. There are now 160 of Cross of Nails Centres around the world.
Falko Schmid. Proceedings of the 4. Internat. Symposium on Location Based Services & TeleCartography, 0, Department of Land Surveying & Geo-Informatics, HongKong Polytechnic University; HongKong, (2007)