TRTCC is looking forward to sharing information about traditional Tibetan art forms. In the mean time, please enjoy this recent find:
The Tibetan Book of Proportions is an “eighteenth-century pattern book written in Newari script with Tibetan numerals, and was apparently produced in Nepal for use in Tibet. It delineates, in 36 ink drawings, precise iconometric guidelines for depiction of the Buddha and Bodhisattva figures.” In public domain, a free download is available on the Getty website, or view here, on the Public Domain Review website.
