Carl Johan Neumann ( 1833 - 1891 ) was a Danish painter. Carl Johan Neumann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5686.87 USD for THE ACROPOLIS in 2003 to 37000.81 USD for Ved tolboden i Beyroeth: scene of a harbour with a toll port, Beirut in 2010 , based on the size and medium of the artwork.