These photographs, taken between 1969 and 2013, document changes in the appearance of Collection over time. The everyday materials Rauschenberg used, such as comic strips and newspaper clippings, magazine reproductions, and commercially printed fabrics, are inherently unstable, making changes in the color of the work inevitable. The artist acknowledged changes caused by the aging process as a natural and acceptable aspect of his work. The sequence also represents the four states of the veil and mirror. The 1969 photo shows the original veil, while the 1999 image depicts the piece with no veil. (Collection was shown and published without the veil from 1972 to 1999.) The 2010 photo shows the work as it appeared after the replacement of the veil in 1999. The 2013 photograph represents the most recent version of the veil, added in 2012. In this iteration the fabric has been shortened, bringing it closer to the size and shape of the original veil.