I especially like this part of the article: "What you see is a meaningless graphic representation of medieval textuality — not a text, not even letters." I'm always fascinated with fonts, and how they're used to convey meaning outside the language they transmit (I used to be a paleographer), so this was just really cool.
I'd forgotten about that (I left Berlin some 20 years ago and we don't have Hugendubel in Bonn) ... but yeah, that design has been around since forever.