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Scholarly articles are not the place to start your research. First, you need to get familiar enough with your topic that you can start to narrow it down, and for that you need more general information. This will help you develop context for your topic as well as get to know the specialized terms used by experts.
Full-text art reference (including Grove Art, but not Benezit Dictionary of Artists) covering all visual arts from prehistory to present. Many images included along with articles providing overviews of artists, movements, periods, and places.
Contains links to 5,000 images the Metropolitan Museum of Art, the Museum of Modern Art (MOMA), Art Images for College Teaching (AICT), and the Artists Rights Society and text from Encyclopedia of Aesthetics, The Oxford Companion to Western Art, and The Concise Oxford Dictionary of Art Terms.
Full text of 285 journals in literature, history, international/cultural studies and other humanities and social science fields.
Depending on your emphasis, it may be useful to search beyond art databases. E.g. if you were looking at the impact of Van Gogh's mental illness on his work, a psychology databases might provide additional insight.