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Signed Mahmud Celaleddin Levha calligraphic inscription Google Art Project . Arabic text reads Signed Mahmud Celaleddin Signed Mahmud Celaleddin Sakp Sabanc Museum sabanciuniv edu PM False AM MC Sakp Sabanc Museum Gold on paper mm False Sakp Sabanc Museum Object levhacalligraphicinscriptionsignedmahmudcelaleddin