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Astronomers at work. Illustration of Rashīd al-Dīn's Jāmiʿ al-Tawarīkh. Tabriz (?), early 14th century. Water colors on paper. Original size: 12 cm x 24.3 cm. Staatsbibliothek Berlin, Orientabteilung, Diez A fol. 72, p. 16 no.1.