Sum of the Arts
Number of positions of movement in Marcel Duchamp's "Nude Descending a Staircase, No. 2" (1912) = 20

Sum of the Arts is a periodic tabulation of numbers floating around the art world and beyond.
- Number of times the Ghent Altarpiece has been stolen = 6
- Number of times the descent capsule used by Soviet Cosmonaut Valentina Tereshkova, the first woman in space, has been exhibited outside of Russia = 1 (in Cosmonauts now at the London Science Museum)
- Number of decades Robert Smithson’s Spiral Jetty was completely submerged underwater = 3
- Number of crocodile heads contained within a single Egyptian crocodile mummy at the Manchester Museum = 8
- Number of positions of movement in Marcel Duchamp’s “Nude Descending a Staircase, No. 2” (1912) = 20
- Age revealed by carbon dating the remains of a Renaissance woman believed by some Italian researchers to be the Leonardo da Vinci’s Mona Lisa model = 63
- Number of artists and art organizations that have pledged to reject fossil fuel-connected funding = 180
- Years the two Rembrandt portraits jointly bought by France and the Netherlands for $179,000,000 (€160,000,000) were in private hands = 400
- Year the only surviving US Navy ship to have sunk an enemy vessel was retired = 1881
- Number of stolen artworks by Goya, Sisley, and other masters that decorated senior Nazi official Hermann Goering’s home = 1,376