Pieter Casteels ( - ) is a Flemish painter. Pieter Casteels s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 100 USD for August in 2006 to 75000 USD for AN GROUP OF BIRDS, INCLUDING A PEACOCK, HENS, AND DOVE IN A GARDEN SETTING WITH FOUNTAIN in 2019 , based on the size and medium of the artwork.