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This relief is one of the seven 'discoverers of the crafts' in the lower register of the socle of the Campanile, of which four are on the west side.
Jubal is mentioned in Genesis 4.21 as the "ancestor of all who played the harp and flute." He was a descendant of Cain, the son of Lamech and Adah, and the brother of Jabal, and half-brother of Tubal-cain and Naamah.
The relief was executed by a collaborator of Andrea Pisano, probably his son, Nino Pisano.
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