Guilio Bertoncelli ( 1880 - 1920 ) was an Italian painter. Guilio Bertoncelli s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 940 USD for Mercato de Fiori a Firenze in 2004 to 2200 USD for MADONNA AND CHILD in 2005 , based on the size and medium of the artwork.