Images are also readily accessible via the growing number of museum or image web sites, which you can usually search by topic. The Grove Dictionary of Art Online and ARTstor provide gateways to image libraries, but you should also try the sites listed below, which include just a few of the best museum image sites on the web. Many museums now have websites; for an extensive list of museums worldwide, from the largest to the smallest and most unusual, go to the Virtual Museums Library. In addition to museum collections, you can also view online exhibitions and "Best of..." sites.

The National Gallery of Art is searchable by artist, but also by chronology, subjects and themes such as 'animals' or 'portraits', so it may be very useful in finding works to compare with your Ackland artwork.

The Fine Arts Museums of San Francisco is a keyword searchable database, with more than 82,000 images.

At the Metropolitan Museum of Art you can search by artist, type or title of object, country or culture, date or keyword.

The Visual Collection contains images from dozens of institutional and private collections throughout the world. You can search by artist, time period, or medium.