FILED · 1478–1834 · CATHOLIC · HISTORICAL
The Spanish Inquisition
A 356-year ecclesiastical tribunal system established by the Catholic Monarchs of Spain in 1478, with papal authorisation, to enforce religious orthodoxy. Approximately 150,000 cases survive in the tribunal records; estimates of executions range from 3,000 to 5,000.
What happened
The Tribunal of the Holy Office of the Inquisition was established in Castile in 1478 by a bull of Pope Sixtus IV, Exigit sincerae devotionis affectus, at the request of Ferdinand II of Aragon and Isabella I of Castile. Its initial remit was the investigation and trial of conversos — Jews who had converted to Christianity, often under duress, and were suspected of secretly continuing Jewish observance.
The remit expanded over the institution's nearly four centuries of operation to include moriscos (Muslim converts and their descendants), Protestants, Illuminists, suspected witches, bigamists, sodomites, and those accused of blasphemy, heresy, or possession of prohibited books. The Inquisition operated through a network of regional tribunals across the Iberian peninsula, the Spanish colonies in the Americas, and Spanish-ruled territories in Italy and the Low Countries.
The Inquisition was a royal tribunal under papal sanction, not a directly papal one. The Spanish crown appointed inquisitors; the institution funded itself through confiscation of the property of the condemned.
The documentary record
Approximately 150,000 case files (relaciones de causas) survive in the Spanish national archives and in regional archives. They are the basis of modern scholarship.
Capital punishment for heresy was carried out by the secular authorities after the Inquisition's "relaxation" of the condemned to civil power. Modern historical estimates of total executions over the 356-year operation range from approximately 3,000 to 5,000 — the upper bound is Henry Kamen's, working from surviving tribunal records. Earlier estimates of tens or hundreds of thousands of executions, repeated in nineteenth-century anti-Catholic polemic and again in some twentieth-century popular writing, are not supported by the tribunal archives.
The lower figures should not be taken to minimise the human reality of the institution: the historical record establishes systematic confiscation, indefinite imprisonment, judicial torture (constrained by procedural rules but documented to have been applied), exile, the destruction of Sephardic Jewish and Morisco communities, and the suppression of intellectual life in the Iberian peninsula across centuries.
End
The Inquisition was suppressed during the Napoleonic occupation in 1808, restored in 1814, suppressed again in 1820, briefly restored, and finally abolished by royal decree on 15 July 1834 under the regency of Maria Christina.
Contested elements
Death-toll figures are contested in the literature; the entry above reflects the consensus of modern archival historians (Kamen, Peters, Pérez). The institutional and procedural record itself is not in dispute. The relationship between the Spanish Inquisition and the earlier medieval inquisitions, and between the Spanish and the Portuguese and Roman Inquisitions, is technical and is treated separately in the scholarship cited.
Sources
- Henry Kamen, The Spanish Inquisition: A Historical Revision, 4th edition (Yale University Press, 2014). Reference modern revisionist account.
- Edward Peters, Inquisition (University of California Press, 1989).
- Joseph Pérez, The Spanish Inquisition: A History (Yale University Press, 2005, English translation).
- Toby Green, Inquisition: The Reign of Fear (Macmillan, 2007).
- Exigit sincerae devotionis affectus, papal bull of Sixtus IV, 1 November 1478 — founding instrument.