I'm really fascinated by how they did photography back in the day. By 1860's, they came up with a way of making colour images using black and white film. I tried to replicate it and here's the results.
I took 3 exposures of the scene using red, green and blue filter for each frame. The photos were later blended in PS with a colour layer of the filter used to achieve the result shown. In the past, they would project the 3 images on screen.