There's some fascinating engraving and illustration to be seen at the Museum of Insurance. (Better than watching paint dry. Seriously)
A gallery of scanned German children's books from the 18th and 19th centuries. Sounds dry, but the plates are high-resolution and gorgeous. Fans of old-school engraving, illustration, and Bibliodyssey-esque curiosities will not be disappointed. Highly extensive and bandwidth-intensive.
Eighteenth century obstetric engravings by Jan van Rymsdyk Dutch illustrator van Rymsdyk (also spelled van Riemsdyk) was working in England when he made 31 engravings for William Hunter's The Anatomy of the Human Gravid Uterus. Recent research suggests Hunter and his fellow pioneer of obstetrics William Smellie may have been responsible for the murders of some 40 pregnant women in order to gain corpses for their anatomical research.
The Speculum Romanae Magnificentiae A collection of over 900 zoomable print engravings, organized around the work of Antonio Lafreri and other Italian publishers, whose documentation of Roman ruins and statues helped fuel the Renaissance. The itineraries are a good place to start for detailed discussion, or just browse away. [via the wonderful Bouphonia]
BibliOdyssey is a new and spectacular compendium of the printed image. From detailed posts on Rare Books of the Japanese Diet Library to a look at some strange illustrations for The Master and the Margarita, the site has a broad range and an eclectic composition authorized by the quality of the posts. Other highlights include Micrographia, a mysterious Astronomické České, the prints of Jacques Callot, and images from Sydney Parkinson's journal of his explorations of New Zealand and Australia. Be sure to look through the archives.