Sum of the Arts

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

The Ghent Altarpiece after its recovery from the Altaussee salt mine at the end of World War II (via aaa.si.edu)
The Ghent Altarpiece after its recovery from the Altaussee salt mine at the end of World War II (via aaa.si.edu)

Sum of the Arts is a periodic tabulation of numbers floating around the art world and beyond.