Fernsehsender Paul Nipkow
The Fernsehsender "Paul Nipkow" (TV Station Paul Nipkow) , also known as Deutscher Fernseh-Rundfunk (German Television Broadcasting), in Berlin, Germany, was the first regular television service in the world. It was on the air from 22 March 1935, until it was shut down in 1944.
Source: Wikipedia — Fernsehsender Paul Nipkow (CC BY-SA 4.0)