Marco De Gregorio ( 1829 - 1876 ) was an Italian painter. Marco De Gregorio s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 497.74 USD for RITRATTO DI FANCIULLA in 2006 to 26290 USD for A Teacher and Students in the Corner of a Mosque in 2010 , based on the size and medium of the artwork.