Among the Sierra Mountains, California: http://americanart.si.edu/collections/search/artwork/?id=2059.

 

George Washington: https://www.nga.gov/exhibitions/2005/stuart/philadelphia.shtm

 

American Progress: http://picturinghistory.gc.cuny.edu/item.php?item_id=180

 

A Banjo Lesson: http://www.themasterpiececards.com/famous-paintings-reviewed/bid/81068/Famous-Painters-Henry-Ossawa-Tanner

 

American Gothic: http://www.americangothichouse.net/about/the-painting/

 

Flag: http://www.moma.org/collection/works/78805

 

Untitled: http://www.haring.com/!/art-work/132#.Vs6Sqtdf2Uk

 

Freedom From Want: http://bigthink.com/Picture-This/what-norman-rockwells-thanksgiving-pictures-really-about

 

Great America: https://www.nga.gov/collection/gallery/collcomm/collcomm-154931.html