ABSTRACT
This chapter describes the design of the map of seventeenth-century global Catholicism to postulate its potential impact on early modern viewers removed from German Jesuit Athanasius Kircher socially, geographically, and chronologically. The Ignatian Tree was not only a map of a religious network but also a two-dimensional paper instrument for calculating time around the world and a baroque visualization meant to impress and overwhelm the senses. The Ignatian Tree is an illustration in a book section on how the principles of light and shadow used in sundials are combined in the Tree to help determine longitude. In the Ignatian Tree, each of the provinces is depicted as a sundial face with their name and the local time when it is noon in Rome. The Ignatian Tree is a schematic map of 466 Jesuit provinces and institutions around the mid seventeenth century. Jesuit missionaries like Eusebio Kino used prisms and simple mathematical instruments to engage potential converts.
