Smarthistory.org: a trusted online resource on art history, with articles and videos created by art history scholars on different cultures and periods (some have more content than others). References for your own further reading and research are always provided.
British Museum Collection Online: the online portal to artifacts in the collection of the British Museum. Elsewhere at the BM’s website, you can find different information on many cultures.
The Metropolitan Museum of Art:: the online portal to artifacts in the collection of the Metropolitan Museum of Art, one of the best collections of ancient art in the world. Elsewhere at the Met’s website, you can find different information on many cultures.
Digitales Forum Romanum: Based at Humboldt University in Germany, this project recreates different periods of the Roman Forum using 3D models. Information, resources, images, and videos of the Forum in the Republican, Augustan, and different Imperial periods can be viewed. Please select English on the right hand side of the screen!
Virtual Rome: Based at the University of Reading in the UK, this site provides some digital models of ancient Rome that can be explored using smartphone QR codes.
Getty Center: This page, part of the Getty Research Institute, provides research resources on ancient Greek and Roman art, including searches of the J. Paul Getty Museum’s collections (getty.edu), open access books, and other information.
Archaeological Park of Pompeii: The official site of the Archaeological Park of Pompeii run by the Italian Ministry of Culture, this website has guides to the different sites, houses, and districts of Pompeii, and information on ongoing excavations. There is a lot of information here about the history of the site and current work.
Capitoline Museums: The Capitoline Museums house many collections of Roman art and history. Search their collections, and read about ongoing excavations and other information.
The Louvre Museum curatorial departments: The curatorial departments have selected around 200 major artworks per department for browsing, but you can search the collections for a specific artwork by title, keyword, and/or accession number.