Free interactive online e-book discusses major renaissance buildings by both architect and type, including background on ancient and medieval buildings. Highly illustrated. User must agree to license for full access.
MIT Open Courseware offers an extensive series of online courses. Course format generally includes lecture videos, interactive concept quizzes (solution key), problem sets, terms and definitions, suggested topics and links, and exams (with solution key).
A digital collection of more than 550 rare illuminated medieval and Renaissance manuscripts from the Parker Library at Corpus Christi College, Cambridge, UK. Includes bibliographical references and page-level annotations. Sixth to sixteenth centuries.
"process.arts.ac.uk is an open online resource sharing day-to-day practice and research of art, design and media. The site encourages users to openly share and use creative commons licensed content and support others in doing the same."
"Smarthistory at Khan Academy is the leading open educational resource for art history. We make high-quality introductory art history content freely available to anyone, anywhere. Smarthistory is a platform for the discipline where art historians contribute in their areas of expertise and learners come from across the globe. We offer nearly 500 videos and these are being translated into dozens of languages."
"This site gives a history of art, worldwide. It contains biographical and societal information on the artists when available. It has examples of the art pieces (since the website is sponsored by a museum, it has many of the pieces itself), with time and place of origin, the owners name, and the fabric/material it is made of. It separates topics by country/empires."
Over 2000 images for use in college classes. "Art Images for College Teaching (AICT) began as a personal project dedicated to the principle of free exchange of image resources for and among members of the educational community."
"Pictify is the global home for sharing your favourite artworks, seeing other people’s, adding your comments, and building your own collection of favourite paintings, sculptures, photography, drawings, or any other art medium."