"The ‚Großdeutsche Reich‘ on air: The German ‚Weihnachtsringsendungen‘ (1939-1944)", talk by H.-U. Wagner at the workshop "Inventing Global Radio" of the Internation Network "Connecting the Wireless World: Writing Global Radio History"of "The Leverhulme Trust" institution at the University of Amsterdam on 1 September 2017.