The Edison/Dixon Experimental Sound Film 1895
The Lumiere Brothers
This is a picture of the most adorable inverters of projected cinema. Well, unless you count Louis Le Prince, who technically invented it first but mysteriously disappeared before his invention was ever sold.
The Execution of Mary Queen of Scotts (1895)
I doubt that this was a poster for the first Lumiere projection, but it is from the first year of projetion. According to the Wikipedia description for the image, it was from 1895