Question

Why are there no photos of Lincoln giving the Gettysburg Address?

Answer 1

Because of its brevity.

Explanation:

In the 19th century, oratory was considered an art form and it was the norm for politicians to speak at length.

(from Wikipedia)

The picture above is the only known to exist of Lincoln giving his address, although he is nearly impossible to pick out.

The reporters and photographers expected a long speech, as was the norm. The photographers present were taking their time getting set up, unlike today, mid-19th Century photography required considerable setup work. By the time they were ready to photograph him, he had finished his speech.