Juan De Nisa Valdes Leal (after) ( 1622 - 1690 ) was a Spanish painter. Juan De Nisa Valdes Leal (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2769.44 USD for The Good Shepherd in 2005 to 18000 USD for An allegory of mortality in 2006 , based on the size and medium of the artwork.