The Atlanta Cyclorama is a cylindrical panoramic painting of the American Civil War Battle of Atlanta. The cyclorama is housed in a museum, also called the "Atlanta Cyclorama", in Grant Park in Atlanta, Georgia. Visitors view the cylindrical painting from the inside, entering through an entrance in the floor. After being seated, the central cylinder rotates slowly affording a view of the entire painting. The painting at one time was the largest oil painting in the world, and if unrolled would measure 42 feet high by 358 feet long. It held this record until 2004, when it was surpassed in size by a mural at the Kalamazoo Air Zoo measuring 32 feet high by 800 feet long.