He did so to heighten the importance of his action. By putting the imperial crown on his own head while the Pope stood by, Napoleon made a symbolic gesture stating that he would be subservient to no one on earth, and that Rome would never command him.
What are the choices? I think the answer would be atomic weapons.
The answer to the question above is radio and phonograph.
The radio and the phonograph are the technology that was introduced in the late 1800s that aided in the spread of jazz music to all parts of the United States and the world.
It was René-Robert Cavelier who was the first French explorer to reach the mouth of the Mississippi River he was sent on this expedition by King Louis XIV and started all the way in Canada.
