I guess that photographer Vivian Maier was inspired by Eugène Atget's work, so for Day #222 of the 365 Days of Art, I bring you some of his work.
Atget also found a way to make money from his photography work, which is very tough to do. For example, his clear photos of door knockers became useful tools for craftsmen - they used the vivid photos to make replicas to sell. The photos allowed them to hone the details of these ornate door knockers.
I guess we take for granted that we can print at home or pull up a computer image almost anywhere today - but not so long ago, many folks were dependent on photographers for their prints.
More info about Atget is here.