There are several annotated bibliographies related to Ancient Egypt that point to relevant books, articles, websites, etc. See Ancient Egyptian Art by Gay Robins, for example. Search for "ancient egypt" in the search box at the top right.
Gateway to several important art historical reference tools, most notably, the Grove Dictionary of Art (Grove Art Online) and Benezit Dictionary of Artists (2006 English ed.). Also includes The Oxford Companion to Western Art (2001), The Concise Oxford Dictionary of Art Terms (2001), The Encyclopedia of Aesthetics (1998), a database of images and more.
Non-art databases/encyclopedias useful for this subject
Projekt Dyabola provides access to the multilingual and regularly updated Archaeological Bibliography, containing book, article and web-based citations from 1956 to the present based on acquisitions at notable archaeological institutes in Europe. Additional resources related to ancient art, archaeology and history are also available. Once in, check the box at the top "activate IP access and press Start".
Indexes journals in classical philology, ancient history, and archaeology. Based on the journal Gnomon: Kritische Zeitschrift fur die gesamte klassische Altertumswissenschaft. A good supplement to L'Annee Philologique since it provides more recent citations.
Bibliographic database of academic literature on ancient Egypt. NOTE: Due to COVID-19, access is currently free. On the OEB homepage, click "log in" and then use: Username: guest Password: temporary 1822+
Database of metadata and, when available, links to images of "texts from the ancient world, particularly late period Egypt and the Nile valley (roughly BC 800 and 800 AD)."
