CAMIO—Catalog of Art Museum Images Online—contains about 95,000 works of fine and decorative art from leading museums around the world. Difficult-to-find contemporary art is one of its strengths. The content includes high-resolution images of photographs, paintings, sculpture, decorative and utilitarian objects, prints, drawings and watercolors, jewelry and costumes, textiles, books, installations, and architecture—plus audio-video and mixed media.
Saskia Digital Image Archive from Scholars Resource contains 30,000 digital images of paintings, sculpture and architecture, including images from many important collections. The descriptive data about the images includes references to the occurrences of these images in 19 major art history texts, including Gardner's Art Through the Ages, 12th edition; Understanding Art, 7th edition; Art and Ideas, 10th edition; Discovering Art History, 4th edition.
Google Art Project is an online platform through which the public can access high-resolution images of artworks housed in the initiative’s partner museums. The project was launched on 1 February 2011 by Google, in cooperation with 17 international museums, including the Tate Gallery, London; the Metropolitan Museum of Art, New York City; and the Uffizi, Florence [from Wikipedia article]
The Metropolitan Museum of Art's Heilbrunn Timeline of Art History presents the Met’s collection via a chronological, geographical, and thematic exploration of global art history. Targeted at students and scholars of art history, it is an invaluable reference, research, and teaching tool. Authored by the Met’s experts—predominantly made up of curators but also of conservators, scientists, and educators—the Timeline comprises 300 timelines, 930 essays, close to 7,000 objects
The Getty Research Portal™ is an online search platform providing global access to digitized art history texts. Through this multilingual, multicultural union catalog, scholars can search and download complete digital copies of publications for the study of art, architecture, material culture, and related fields. The Getty Research Portal has the potential to revolutionize how art historians conduct research by widening the availability of rare books, early foundational literature, and important periodicals from libraries across the world. It will especially benefit students and scholars without access to a major art history library. The Portal is free to all users.