Guglielmo Janni ( 1872 - 1958 ) was an Italian painter. Guglielmo Janni s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 286.87 USD for Nel giardino in 2013 to 16990.91 USD for Atleti in palestra in 2017 , based on the size and medium of the artwork.