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Printers’ marks were a type of self-protection akin to a trademark or copyright today. Sometimes they protected privileges granted by kings or religious leaders. Often they incorporated mottoes based on the names of kings or religious leaders. Mottoes were often in Latin and sometimes in Greek or Hebrew. There are fifty-six printers’ marks around the ceiling on this level. • John Day• Charles Scribner’s Sons• Harper and Brothers • Riverside Press
