Hajo Meyer was a German-born Dutch physicist, Holocaust survivor and political activist. While primarily known for his public commentaries in terms of the European Jewish community, he is also noted for his work directing the facility Philips Natuurkundig Laboratorium for many years.

Bielefeld is a city in the Ostwestfalen-Lippe Region in the north-east of North Rhine-Westphalia, Germany. With a population of 341,755, it is also the most populous city in the administrative region of Detmold and the 18th largest city in Germany.