Giovanni Battista Vanni ( 1599 - 1660 ) was an Italian painter. Giovanni Battista Vanni s works have been put up for auction numerous times, with realized prices varying from 2535.98 USD for THE ASSUMPTION OF THE VIRGIN (11). in 2006 to 37012.38 USD for Portrait of the artist, half-length, holding a sheet of music, with a violinist and a lady holding a lap dog in 2009 , based on the size and med