I spent last week in Aegina, a Greek island about 40 minutes southwest of Athens. I traveled to this part of the world to participate in a workshop on comparative constitutional change. I presented a draft of my chapter on Formal Amendment Rules: Functions and Design, to be published in the forthcoming Research Handbook on Comparative Constitutional Change. In the chapter, I explain the functions of formal amendment rules, critique existing classifications of formal amendment rules, and suggest the beginnings of a more comprehensive account of their structure. My purposes in the chapter are to map the scholarly understanding of formal amendment rules and to generate an agenda for further research into this severely understudied subject in constitutional design.