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— CH. 1 · INTRODUCTION —

Spanish Inquisition

~10 min read · Ch. 1 of 7
7 sections

  • The Spanish Inquisition began with a single papal bull and a question about smoke. On the 6th of February 1481, six people were burned alive in Seville at the first auto de fe execution. That morning launched an institution that would prosecute an estimated 150,000 people over the course of its existence, reshape the ethnic map of the Iberian Peninsula, and leave a mark on scientific inquiry, economic development, and popular culture that scholars are still measuring today.

    What drove a newly unified Spanish monarchy to build a tribunal explicitly designed to investigate the inner lives of its subjects? How did a church mechanism originally aimed at false converts become an instrument of state power, property seizure, and racial classification? And why did it endure for more than three centuries, surviving Enlightenment criticism, Napoleonic abolition, and liberal revolts, before a regent finally dissolved it by royal decree in 1834? Those questions run beneath every phase of the Inquisition's story.

  • Roman Emperor Constantine legalized Christianity in 313 with the Edict of Milan. What followed was a reversal: the once-persecuted faith began persecuting heterodox beliefs of its own. In 380, Emperor Theodosius I established Nicene Christianity as the official religion of the Roman Empire and condemned other Christian creeds as heresies deserving repression. By 438, the Theodosian Code provided for property confiscation and execution for heretics.

    Spain's own trajectory hardened after 587, when the Visigoth royal family converted to Catholicism. The monarchy and the Church aligned, and restrictions on Jews multiplied across successive Councils of Toledo. King Sisebut issued a decree in 613 demanding conversion or expulsion. The oppression grew severe enough that some Jewish communities welcomed the Muslim invasion in 711 as relief from an increasingly hostile crown.

    Pope Lucius III created the Episcopal Inquisition in 1184 to combat the Cathar heresy in southern France. When that failed, Pope Innocent III launched the Albigensian Crusade, whose forces killed between 200,000 and 1,000,000 Cathars, including a massacre at Béziers. In 1252, Pope Innocent IV authorized inquisitors to use torture against heretics with the bull Ad extirpanda. The Dominican Order, established to preach against heresy, became the institutional backbone of inquisitorial work across Europe.

    By the late 14th century, anti-Jewish preaching had become explosive. Ferrand Martínez, Archdeacon of Écija, inflamed mobs across Castile and Aragon through years of virulent sermons. In 1391, riots broke out in Seville, Barcelona, Valencia, Toledo, Mallorca, and elsewhere, killing thousands of Jews. An estimated 100,000, roughly half of all Spanish Jews at the time, converted to Catholicism to save their lives. These converts, called conversos, became the Inquisition's primary target within a generation.

  • Queen Isabella grew convinced of the existence of Crypto-Judaism among Andalusian conversos during her stay in Seville between 1477 and 1478. A report by Pedro González de Mendoza, Archbishop of Seville, and by the Dominican friar Tomás de Torquemada, who served as confessor to Ferdinand and Isabella, supported that belief. The monarchs petitioned Rome, and in 1478 Pope Sixtus IV issued the bull Exigit sincerae devotionis affectus, granting them authority to appoint inquisitors.

    The first two inquisitors, the Dominicans Miguel de Morillo and Juan de San Martín, were named on the 27th of September 1480. When thousands of conversos fled Seville in terror after the first burnings, government revenues fell. Isabella remained unmoved. The chronicler Hernando del Pulgar recorded her stating that "the essential thing was to cleanse the country of that sin of heresy."

    Expansion into Aragon met resistance because locals saw it as an infringement on regional rights. Pope Sixtus IV issued a striking bull on the 18th of April 1482, which historian Henry Charles Lea called "the most extraordinary bull in the history of the Inquisition." It accused inquisitors in Aragon, Valencia, Mallorca, and Catalonia of acting "not by zeal for the faith and the salvation of souls, but by lust for wealth," and of condemning true Christians on the testimony of enemies, slaves, and rivals. Ferdinand responded by feigning doubt about the bull's authenticity, writing to the Pope on the 13th of May 1482 to demand the matter go no further. The Pope suspended the bull, then reversed course entirely. On the 17th of October 1483, he issued a new bull appointing Torquemada Inquisitor General of Aragon, Catalonia, and Valencia, uniting the entire Spanish operation under a single leader. The first conversos in Aragon burned at the stake the following year, in 1484.

  • Torquemada established formal Inquisition procedures in 1484 with a 28-article code, the Compilación de las instrucciones del oficio de la Santa Inquisición, drawing on Nicholas Eymerich's Directorium Inquisitorum. That code remained largely unchanged for over three centuries.

    When the Inquisition arrived in a city, it issued an Edict of Grace after Sunday Mass, inviting confessions during a grace period of typically 30 to 40 days. After around 1500, Edicts of Faith replaced these, dropping the grace period and emphasizing denunciation. Signs of Crypto-Judaism in the tribunal's view included no chimney smoke on Saturdays, buying large quantities of vegetables before Passover, or purchasing meat from a converted butcher. Accusations were anonymous: defendants never learned who had accused them.

    Torture could be applied when heresy was "half proven," and confessions extracted under torture were officially recorded as "true, not forced." Permitted methods included the garrucha, which suspended victims by their wrists with weights on their feet; the toca, or water interrogation now called waterboarding; and the potro, or rack, likely the most commonly used method. Henry Lea estimated the Toledo court tortured about 33.3% of those tried for Protestant heresy between 1575 and 1610. The Lima tribunal likely tortured nearly all accused in cases from 1635 to 1639.

    Property confiscation was built into the process from the moment of arrest. Between 1536 and 1543, eight courts seized 87 million maravedis from victims. Legal expert Francisco Peña wrote in 1578 that trials and executions aimed to ensure public good and instill fear, requiring public sentencing "for education and to terrify." One converso from Toledo wrote to King Charles I warning that the Inquisition's dependence on confiscated property meant, in his words, "if they do not burn they do not eat."

  • Torquemada persuaded the monarchs that unbaptized Jews remaining in Spain posed a permanent threat to converso orthodoxy. The result was the 1492 Alhambra Decree, which ordered all Jews, regardless of age, to leave the kingdom and never return, under penalty of death and property confiscation. Estimates of those expelled vary considerably. Early accounts by Juan de Mariana put the figure at 800,000, while Don Isaac Abravanel claimed 300,000. Modern estimates based on tax returns and population data suggest about 40,000 emigrated. Joseph Pérez estimates 50,000 to 100,000 expelled.

    Expelled Jews, known as Sephardic Jews, scattered across the Mediterranean world. Those from Castile mainly fled to Portugal, where forced conversion followed in 1497. Jews from Aragon often went to Italy. Sicily, then under Spanish rule and home to between 25,000 and 37,000 Jews, faced expulsions in 1492 as well. Many settled in the Ottoman Empire, particularly Thessaloniki, where expellees built synagogues named after Castile, Aragon, and Catalonia in 1492-1493.

    A parallel campaign targeted Moriscos, converts from Islam. A decree on the 14th of February 1502 forced Muslims in Granada to convert or face expulsion. From 1560 to 1571, Moriscos comprised 82% of Granada's tribunal cases. In 1609, King Philip III, advised by the Duke of Lerma and Archbishop Juan de Ribera, ordered a full expulsion. Estimates suggest 300,000 Moriscos, approximately 4% of Spain's population, were expelled. Valencia, where ethnic tensions ran highest, suffered economic collapse and depopulation.

    The blood purity statutes, limpieza de sangre, formalized racial discrimination within the Church and state. Toledo enacted the first statute in 1449, barring conversos and their descendants from holding public or private office or testifying in court. By 1530, Inquisition tribunals required towns to maintain genealogy registers, labeling men and their families as Old Christians or conversos. In 1593, the Jesuits adopted the Decree de genere, barring anyone with any Jewish or Muslim ancestry from joining the Society of Jesus. In Mallorca, no Xueta priests could perform Mass in a cathedral until the 1960s. The Alhambra Decree itself was not rescinded until the 16th of December 1968.

  • The Spanish Inquisition's first Index of prohibited books appeared in 1551, a reprint of the 1550 University of Leuven Index. Further Indexes followed in 1559, 1583, 1612, 1632, and 1640. The 1559 Index spanned 72 pages; the 1667 edition reached 1,300 pages. Among those appearing on the Index were Ovid, Dante, Rabelais, Ariosto, Machiavelli, Erasmus, and Erasmus's admirer, the humanist Fray Luis de León, a converso who was imprisoned from 1572 to 1576 for translating the Song of Songs from Hebrew.

    Major Spanish authors also appeared on the prohibited lists, including Bartolomé Torres Naharro, Juan del Enzina, Jorge de Montemayor, Lope de Vega, and the anonymous author of Lazarillo de Tormes. La Celestina faced expurgation in 1632 and a full ban in 1790. Irving Leonard found that romances like Amadis of Gaul reached the New World despite royal bans, in part with Inquisition approval.

    A 2025 study found that the Inquisition had measurable chilling effects on scientific inquiry, reducing scholars' willingness to interact with others and driving them to divert their efforts away from STEM fields or to pursue them outside Spain. Book output and university attendance in STEM fields fell in areas under strong inquisitorial presence. One exiled Spaniard captured the climate plainly: "Our country is a land of pride and envy... one cannot produce culture without suspicion of heresy, error, and Judaism." A 2021 study found that municipalities in Spain with a stronger historical inquisitorial presence show lower economic performance, educational attainment, and trust in the present day.

  • The Enlightenment reached Spain slowly, filtered through censorship and royal suspicion. Leading Spanish Enlightenment figures, including Olavide in 1776, Iriarte in 1779, and Jovellanos in 1796, faced Inquisition trials. Jovellanos described the courts' operators as "friars who take the position only to gather gossip and avoid choir duties; ignorant of foreign languages, knowing only a little scholastic theology."

    Napoleon's occupation brought the first formal abolition. The Inquisition was dissolved during the rule of Joseph Bonaparte between 1808 and 1812, and the liberal Cortes of Cádiz secured a second abolition in 1813. Ferdinand VII restored it on the 1st of July 1814. Juan Antonio Llorente, who had served as the Inquisition's general secretary in 1789 before becoming a Bonapartist, published a critical history in 1817 from French exile, drawing on his access to the institution's own archives.

    The Inquisition was abolished again during the Trienio Liberal from 1820 to 1823, then persisted informally during the Ominous Decade through the Congregation of the Meetings of Faith, established in dioceses by Ferdinand VII. The last execution for heresy, that of schoolteacher Cayetano Ripoll for teaching deist principles, occurred on the 26th of July 1826 in Valencia, provoking a Europe-wide scandal. On the 15th of July 1834, regent Maria Christina of the Two Sicilies abolished the institution by Royal Decree, with approval from Cabinet President Francisco Martínez de la Rosa, during the minority of Isabella II. The auto de fe in Logroño on the 7th and the 8th of November 1610, which burned six people and five more in effigy for alleged witchcraft in Zugarramurdi, had prompted inquisitor Alonso de Salazar Frías to report to the Suprema that "neither witches nor bewitched existed in a village until they were discussed or written about" - a skepticism that arrived centuries too late for most of the Inquisition's 150,000 victims.

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Inquisition

Common questions

When was the Spanish Inquisition established and who authorized it?

Pope Sixtus IV authorized the Spanish Inquisition in 1478 with the bull Exigit sincerae devotionis affectus. The first two inquisitors, the Dominicans Miguel de Morillo and Juan de San Martín, were appointed on the 27th of September 1480 by King Ferdinand II of Aragon and Queen Isabella I of Castile.

How many people did the Spanish Inquisition prosecute and execute?

The Spanish Inquisition prosecuted an estimated 150,000 people over its history. Of these, an estimated 3,000-5,000 were executed, mostly by burning at the stake, with executions concentrated in the initial decades between 1480 and 1530.

Who was Tomás de Torquemada and what role did he play in the Spanish Inquisition?

Tomás de Torquemada was a Dominican friar who served as confessor to Ferdinand and Isabella before being appointed Inquisitor General of Aragon, Catalonia, and Valencia by Pope Sixtus IV on the 17th of October 1483, uniting all Spanish inquisitorial activity under a single leader. He established the Inquisition's formal trial procedures in 1484 with a 28-article code that remained largely unchanged for over three centuries, and he persuaded the monarchs to issue the 1492 Alhambra Decree expelling all Jews from Spain.

What was the Alhambra Decree and when was it rescinded?

The Alhambra Decree of 1492 ordered all Jews, regardless of age, to leave Spain and never return, under penalty of death and property confiscation. Joseph Pérez estimates that between 50,000 and 100,000 Jews were expelled. The decree was not rescinded until the 16th of December 1968, when Francisco Franco revoked it following the Second Vatican Council's rejection of Jewish deicide.

What were the limpieza de sangre statutes and how long did they last?

Limpieza de sangre, or blood purity statutes, were laws targeting Jewish and Muslim converts to Christianity that introduced race-based discrimination and antisemitism. Toledo enacted the first statute in 1449, barring conversos and their descendants from holding public office or testifying in court. In 1593, the Jesuits adopted the Decree de genere, barring anyone with any Jewish or Muslim ancestry from the Society of Jesus. These statutes persisted in some areas into the 19th century, and in Mallorca no Xueta priests could perform Mass in a cathedral until the 1960s.

When was the Spanish Inquisition finally abolished?

The Spanish Inquisition was permanently abolished on the 15th of July 1834 by regent Maria Christina of the Two Sicilies, with approval from Cabinet President Francisco Martínez de la Rosa. The last execution carried out under its authority was that of schoolteacher Cayetano Ripoll, hanged on the 26th of July 1826 in Valencia for teaching deist principles.

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All sources

93 references cited across the entry

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