Vivian Maier was an American amateur street photographer who was born in 1927 in New York by a French mother and grew up in France. She returned in the U.S.A., in Chicago and worked as a nanny for 40 years. There and during this time period, she took almost 100.000 photographs, primarily of people and cityscapes most often in Chicago, although she traveled worldwide, taking pictures in each location. That her self portrait.
Her photographs remained unknown and mostly undeveloped until they were discovered by a local historian, John Maloof, in 2007. He acquired Vivian's negatives while at a furniture and antique auction while researching a history book.
He has become very attached to her work and is set in putting her name in photography’s history books. Up to today he has developed some ten thousands photos and has many more undeveloped rolls of film.
Here you can go through the blog he has created for her, where I found her photos and fell in love with her work. There is also a segment from the CBS news from two days ago, documenting Vivian Maier's life and work.