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"The Web Gallery of Art is a searchable database of European fine arts and architecture (8th-19th centuries), currently containing over 43.400 reproductions. Artist biographies, commentaries, guided tours, period music, catalogue, free postcard and mobile services are provided." (From site.)
Locate scholarly articles, court cases, and books. Not all articles are peer-reviewed. Limited full-text availability. Google Scholar settings can be configured to link to John Esch library database contents.