National Portrait Gallery
http://www.npg.org.uk/live/search/

National Gallery of Art
http://www.nga.gov/collection/gallery.html

Per fare esercizio di listening
http://www.nga.gov/podcasts/index.shtm

Metropolitan Museum
http://http://www.metmuseum.org/works_of_art/collection_database/index.aspx?dep=0&vw=1

Museum of Fine Arts, Boston
http://www.mfa.org/collections/index.asp

Musei Vaticani Online
http://mv.vatican.va/2_IT/pages/MV_Musei.html