The Gettysburg Cyclorama was a 360 degree cylindrical painting depicting Pickett's Charge, the failed infantry assault at the Battle of Gettysburg. It was originally exhibited in Chicago in 1883, a second version opened in Boston in 1884, a third in Philadelphia in 1886, and a fourth at City Hall Square in Brooklyn in October 1886. The Duryea Photo studio was created in 1876 by Sanford Bennett Duryea, who retired in 1893. His son Henry Augustus Duryea worked in the studio from about 1880 until his death in 1889. The photos were given to the Cornell University Library by George Lincoln Burr.