Inquisition and Purity of Blood in Portugal during the Seventeenth Century

The aim of this paper is to analyse the role played by the Portuguese Holy Office in the process of social discrimination against New Christians, that is, those who were considered to be descendant of Jews converted to Christianity in the late fifteenth century. This article focuses specifically on the different and changing attitudes of the Inquisitors General to the issue of purity of blood during the seventeenth century. In the course of that century, some people considered to be New Christians (with fama or nota) managed to join the Portuguese Holy Office. Nevertheless, this was not due to the fact that Inquisitors General and members of the General Council rejected discrimination using theoretical, religious and moral arguments, but to the impossibility of achieving undoubtful knowledge about the origins of those seeking to join the Inquisition. At the same time, once racial discrimination became institutionalised within the Inquisition during the final third of the sixteenth century, the Inquisitors General became less concerned about the allegations of impure blood made about some of its ministers, so long as it could be demonstrated that they were good Christians and of use to the institution, or else capable of contributing to the specific personal interests of the tribunal's rector. Nevertheless, not all supposed or real conversos succeeded in joining the Holy Office, as evidenced by cases of self-exclusion and the numerous proofs of "purity of blood" that were not approved. To address these questions, we turn to the proofs of "purity of blood" carried out by the Portuguese Inquisition, as well as to correspondence and documents from other institutions of the Portuguese and Spanish monarchies.