The Bayeux Tapestry is a 230 foot embroidered cloth (evidently, not actually a "tapestry") that depicts the Norman invasion of England in 1066. Scott McCloud claims that it is one of the oldest forms of "sequential art," and uses it as an example of the kinds of interesting directions
webcomics can take, what with those horizontal scroll bars in your web browser. You can see the whole thing
online, but what do they do? Adhering to common webcomic format, it's broken down into screen-sized bites for your convenience. Sorry, Scott!