The first photographic portrait of a human being was a selfie, and it was taken in a backyard on Chestnut Street in Philadelphia.
Robert Cornelius was a metallurgist and amateur chemist who worked in his family's lamp and chandelier business at 710 Chestnut Street.
Louis Daguerre announced his photographic process to the French Academy of Sciences in August 1839, and the news reached America that autumn. At the time, portrait photography was considered impractical — exposure times were simply too long for a person to hold a pose.
Within roughly two months of the announcement, Cornelius built a camera from a box fitted with a lens from an opera glass. He set it up in the yard behind the store to use the daylight, uncovered the lens, walked into frame, folded his arms, and stood still for somewhere between ten and fifteen minutes.
He wrote on the back that it was the first light picture ever taken. It is the earliest extant American portrait photograph and one of the treasures of the Library of Congress collection.
Cornelius went on to open Philadelphia's first portrait studio — and quit photography entirely within a few years to return to the family lamp business.