A manuscript extant in two versions recounts the history of Portugal from the Vision of Ourique to the Restoration and onward to the ascension to the throne of Afonso VI in 1657. It stems from the hand of a Franciscan living in Goa named António de Sao Thiago. The ink drawings in these manuscripts, presumably made by an Indian artist, are an integral part of their argumentation. One version of the manuscript is located in Harvard, the other version in Lisbon. They clearly derive from the same pairing of author and draughtsman, but they are not identical. There are passages in the Harvard manuscript that are missing in the Lisbon version, which also has fewer images. The treatise focuses on the translatio of the salvific mission from the ancient Israelites to the Portuguese, beginning with Afonso Henriques. Prophecies from the Old Testament are here cited to demonstrate that the Portuguese are the new apostles and missionaries, who are in the process of implementing a divinely ordained universal conversion. Above all, for António de São Thiago, the Portuguese have been chosen to missionize and convert the East, from where Christ's return was expected. This providential destiny would be fulfilled by the Braganza dynasty, a fact pointed to by the Portuguese monarchy's reconquest of many overseas territories that had been considered lost.