J. Paul Getty Museum/The Getty Research Institute:
The Getty has a large digital collection that is free to access. They also have access to many digitized art history texts, which is also free to use through their Getty Research Portal. The Getty Library is also free to use, although appointments are recommended in advance, so librarians will know ahead of time your topic of research.
http://www.getty.edu/research/tools/
Google Art Project:
An online site that gives the public access to a large collection of high-resolution images from numerous art museums around the world. Visitors can also virtually tour through museums as well.
http://www.google.com/culturalinstitute/project/art-project
New York Art Resources Consortium:
This site combines the research libraries of three New York art museums: the Brooklyn Museum, the Frick Collection, and The Museum of Modern Art.
http://nyarc.org/
The Metropolitan Museum of Art:
http://www.metmuseum.org/research
Documents of 20th-Century Latin American and Latino Art (Museum of Fine Arts, Houston):
A digital archives that provides primary sources and documents on the development of 20th-century art in Latin America and of Latinos throughout America.
http://www.metmuseum.org/research
The Getty has a large digital collection that is free to access. They also have access to many digitized art history texts, which is also free to use through their Getty Research Portal. The Getty Library is also free to use, although appointments are recommended in advance, so librarians will know ahead of time your topic of research.
http://www.getty.edu/research/tools/
Google Art Project:
An online site that gives the public access to a large collection of high-resolution images from numerous art museums around the world. Visitors can also virtually tour through museums as well.
http://www.google.com/culturalinstitute/project/art-project
New York Art Resources Consortium:
This site combines the research libraries of three New York art museums: the Brooklyn Museum, the Frick Collection, and The Museum of Modern Art.
http://nyarc.org/
The Metropolitan Museum of Art:
http://www.metmuseum.org/research
Documents of 20th-Century Latin American and Latino Art (Museum of Fine Arts, Houston):
A digital archives that provides primary sources and documents on the development of 20th-century art in Latin America and of Latinos throughout America.
http://www.metmuseum.org/research