Königs Wusterhausen radio transmitter
The Königs Wusterhausen transmitter (German: Sender Königs Wusterhausen) was a large transmission facility for longwave, mediumwave and shortwave radio, located near Königs Wusterhausen southeast of Berlin, Germany. Initially built by the telegraph battalion of the German Army, operation began during World War I in 1916. On 22 December 1920, the transmission of a Christmas concert marked the birth of public broadcasting in Germany.