Hark, A Vagrant! is a comic I simply adore, and I could go on forever about why I like it. So instead, I'll just list a few reasons why I like it so much.
A) It's funny. This is very rare in webcomics, and comics in general. The commentary manages to be interesting and amusing at the same time without comic off as too silly, and the Black Comedy
and Ho Yay
applied to real life historical figures is simply hysterical, especially if you're clued in about their role in history.
B) The art is quite nice. Though only in the much later pages.
C) You might learn something. The author is a legit historian.
Give it a read.