This font was inspired by the idea that he felt the need to safeguard his communications from people with the capability to read; a rare ability then. Did he actually command such a script to exist? He did prompt the advancement Carolingian tiny script. Here are 2 different systems that are both credited to him.
Does it offer any real security? No, however it is fun to think of how such a system may have been used.
Font Family: Big Chuck
Tags: 9th century, charlemagne, cipher, decorative