Since Pen Argyl High School in Pen Argyl, Pennsylvania was in the process of redeveloping its mascot, the Green Knight, the author decided to implement a studio project based on armor. In groups of three, students would research an assigned type of historical armor, replicate it in cardboard, and fit it to a group member. The lesson had heavy emphasis on studio time, but included connections to various art fields such as art history, design, and costume and fashion design, as well as mathematics and language arts. In this article, the author describes how his students created and designed their cardboard armor. (Contains 1 online resource.)