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Tabernacle of the Four Crowned Saints, detail of the bas-relief depicting two saints at work:  one builds a wall, while the other holds a drill and works on a column, Nanni di Banco, 1408, Orsanmichele, Florence.
Tabernacle of the Four Crowned Saints, detail of the bas-relief depicting two saints at work: one builds a wall, while the other holds a drill and works on a column, Nanni di Banco, 1408, Orsanmichele, Florence.
© Institute and Museum of the History of Science / Marco Berni

Last update 08/feb/2008