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This paper discusses descriptions of color theory in a series of lapidaries by Nıshābūrı, Tūsı and Kāshānı, written in 1196, ca. 1258 and in 1300, respectively. The texts are almost identical and seem to originate from Nıshābūrı. They describe a color theory that deviates from the Aristotelian account in several ways. They represent one of the first instances in which it is stated explicitly that...
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