On June 25, 1767, royal officials in all Spanish territories, including the Americas, began the process of expelling the members of the Society of Jesus. At the time there were some 2,200-2,400 Jesuits in Spanish America, and they staffed urban colegios and frontier missions. This book provides an overview of Jesuit institutions at the time of the expulsion order, their urban role, and the status of frontier missions focusing on the case study of several issues related to the Missions among the Guaraní in South America. This volume contains a visual catalog of historic maps, and historic and contemporary images of selected Jesuit colegios and other urban institutions.