images: William Forsythe / Hypothetical Stream choreography (1997)

For the dance company of Daniel Larrieu

source for both images & great resources: http://sarma.be/oralsite/pages/William_Forsythe_on_Scores/

images: Tiepolo

William Forsythe speaks about Tiepolo's drawings being positioned in space, with no up, no down. Accessible from any direction. I haven't yet found a really suitable example to illustrate his point, but here is a test..

flying cherubs

source: http://www.columbia.edu/cu/arthistory/images/Tiepolo-Flying-Cherubs.jpg

I can only suspect that William Forsythe could have used any number of artist's drawings as a starting position for his choreography of Hypothetical Stream in 1997. William Forsuthe mentions how the drawings have no up or down and can be entered from any direction. I can not actually find a lot of evidence of Tiepolo drawing in that way specifically. I think it is very likely that a lot of sketches of other artists have this quality, too. But below is a good example of the directionless quality that Forsythe mentioned and used as a starting point to create a choreography for 8 dancer's.

Giovanni Battista Tiepolo (1696–1770)
Three Studies of Bacchus
Pen and brown ink, brown wash, over black chalk
13 x 10 13/16 inches (333 x 275 mm)
Gift of J. P. Morgan, Jr.; IV, 117a

source: http://www.themorgan.org/collections/images/drawings/tiepolo_iv117a.jpg

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and then I found this, totally off topic but also by Tiepolo:

source: http://www.venicethefuture.com/schede/uk/207?aliusid=207