Pieter Gerardus Van Os ( 1776 - 1839 ) was a Dutch painter. Pieter Gerardus Van Os s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 500 USD for Landscape with Cows Resting. in 2004 to 9879.08 USD for A peasant family in the meadow in 2008 , based on the size and medium of the artwork.