From Matt Baker at Useful Charts: This chart shows how the letters used to write English (and many other languages) evolved from Proto-Sinaitic, through Phoenician, early Greek and early Latin, to their present forms. You can see how some letters were dropped and others ended up evolving into more than one letter.

For obvious reasons, this hits my Venn Diagram of my love for Biblical languages (Hebrew & Greek) and my love for typography and design. This one may find its way onto my office wall as a print.