Johann Ulrich Mayer ( 1630 - 1704 ) was a painter. Johann Ulrich Mayer s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 8317.39 USD for De muze Thalia `poeta laureata` in 2004 to 18000 USD for PORTRAIT OF A MAN HOLDING A FLAG in 2006 , based on the size and medium of the artwork.