This Vivian Maier blog explains the following

This was created in dedication to the photographer Vivian Maier, a street photographer from the 1950s - 1990s. Vivian's work was discovered at an auction here in Chicago where she resided most of her life. Her discovered work includes over 100,000 mostly medium format negatives, thousands of prints, and a ton of undeveloped rolls of film. I have approximately 90-95% of the work.

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