A few nice history images I found:

A Brief History of Hollywood

Image by Profound Whatever
1930 – Radio rises as a direct competitor to the movies, able to bring the show into the audience’s own living rooms. At first, the moguls ignore radio and refuse to let their stars perform on the airwaves. The moguls eventually accept radio as an opportunity, not a competitor, and lure pre-existing radio stars to the movie business. Among those is Bing Crosby, who becomes the biggest box office draw five years consecutively. In the end, the movie industry doesn’t defeat radio, but rather absorbs it.

Crosby in HOLLYWOOD ON PARADE (1932):
www.youtube.com/watch?v=HSXZF8WWR4g
ROBIN AND THE 7 HOODS (1964):
www.youtube.com/watch?v=k5jDX-k7m6g

The Museum of Military History

Image by mattias811
The Museum of Military History Vienna , Austria