This project explores the economic, physical, political, and cultural geography of medieval Ireland by mapping the 1302-20 papal tax valuations of ecclesiastical benefices, with parish incomes being used as proxies for local economies. Doing so addresses a lack of uniform, island-wide, and fine-tuned economic data for medieval Ireland. These valuations were ascertained for the purposes of papal tenth, or decime, taxations and offer a unique and invaluable look into the landscape of medieval Ireland that transcends cultural boundaries. An initial step of this project was to clarify the details and nuances behind papal taxation, as well as papal finances specifically in Ireland. For this task, fieldwork was undertaken at the Vatican Secret Ar...