Street photography is photography that features the human condition within public places and does not necessitate the presence of a street or even the urban environment. The subject of the photograph might be absent of people and can be an object or environment where the image projects a decidedly human character in facsimile or aesthetic. The origin of the term 'Street' refers to a time rather than a place, a time when women achieved greater freedom, when workers were rewarded with leisure time and when society left the privacy of their sitting rooms, people engaged with each other and their surroundings more publicly and therein the opportunity for the photographer.
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source: Wikipedia