Notes
1. “Pott” is a colloquial denomination for the Ruhr area, which consists of several connected large cities, such as Dortmund, Duisburg and Essen, and is the fifth largest conurbation in Europe.
2. On 28 October 1958, Bill Haley & His Comets played at the Grugahalle protected by over 200 policemen.
3. Quoted from the display boards (found in front of every showroom) which attempt to contextualise the exhibited objects.