 The plans for Hawkwood 's commemoration were modified on December 2 , 1395 , when it was decided to also rework the wooden monument of Pietro Farnese , the hero of the Pisan war , and to place marble tomb monuments to Farnese and Hawkwood on the north aisle , facing the high altar . Painters Agnolo Gaddi and Giuliano Arrighi were selected by a committee to sketch directly onto the Duomo wall models for the Hawkwood and Farnese tombs . Although neither tomb was realized , documentary evidence suggests that a painting of Hawkwood — with a figure of Hawkwood by Gaddi and a sarcophagus by Pesello — was completed by June 16 , 1396 . Historian Frances Stonor Saunders speculates that Uccello may have based his representation of Hawkwood on this early painting and that the earlier painting may have been based on a death mask of Hawkwood . The Hawkwood fresco is situated in the third bay of the northern wall , today flanked by paintings of Dante ( c . 1455 ) and a similar fresco monument to fellow mercenary Niccolò da Tolentino ( 1456 , by Andrea del Castagno ) ; fictive tombs in fresco of two humanist ecclesiasts — Bishop Corsini ( c . 1422 , probably by Giovanni dal Ponte ) and Fra Luigi de ' Marsigli ( c . 1439 by Bicci di Lorenzo ) , an Augustinian monk who founded a literary academy — are much smaller than those of the two condottieri . The fresco probably came to replace the tomb ( rather than serving as a place marker for it ) for reasons of expedience and frugality , although on these points there is little documentary evidence . 
