Mount Kumgang, anonymous Korean artist.  undated.

Channa Horwitz, Canon Series #10, Black White. 1982.

Guatemalan Mayan mask. Jadeite. 250-850 AD.

Henry Piercy Pan. Slipware. Alexandria, Pennsylvania. ca. 1792–1796. 

Victor Hugo, from his series Stains. circa 1850.

Timothy H. O’Sullivan,Buttes near Green River City, Wyoming. 1872.

Robert Smithson, The Museum of the Void. 1969.

John Zurier, Indigo. 2016.

Leonardo da Vinci, A Map of a Weir on the Arno East of Florence. 1504.