One of the best and largest (and continually growing) free image collections on the internet and one of the longest in existence is the Carol Jackson Fine Art - Virtual Art Museum.
Another great place to look for indexed images is the Art Images for College Teaching website.
A collaborative online effort seen at the Wikimedia Commons is exciting!
An enormously huge online art museum can be seen here: Art Renewal Center!
A great list (though not as comprehensive as I hope ours will be) is the Image Collections and Digital Imaging Information list offered as another section of the Boston College Art Links on the World Wide Web page.
Note: Lists such as these that provide individual links are perfectly fine to post to each area of this blog. The challenge will be to find other excellent resources not necessarily listed on such lists. Annotating WHY you choose to post a particular link or list is one of the course requirements found in your Using Our Classroom Blog Guide found in our WebTycho classroom.
