The Persecution of the Conversos in Spain and Portugal

Caught between Judaism and Christianity, the Conversos of Spain and Portugal fell under widespread suspicion.

Published: Dec 27, 2025 written by Greg Pasciuto, BA History

Torquemada before Ferdinand and Isabella

 

Early Modern Europe was a region plagued by anti-Jewish sentiment. Jews across the continent were viewed as dangerous enemies of Christianity. Jewish communities faced intense persecution for their religious practices, as well as their economic activities.

 

In the Iberian Peninsula (modern-day Spain and Portugal), Christian rulers made it their mission to convert Jews to the Catholic Church. Jews who were baptized as Catholics became known as Conversos. Yet even those Conversos who were sincere in the Catholic religion fell under suspicion from hostile non-Jewish neighbors. Could they actually be practicing Jewish rites in secret?

 

Jews and Conversos in Iberia

spanish kingdoms map conversos
Map of the Spanish kingdoms in 1210. Source: University of Texas at Austin

 

Jewish people have lived in Iberia since the Late Roman Period. Their communities existed alongside the growth of Christianity across the Mediterranean region. Christianity spawned from ancient Judaism, but by the 5th century, Jews and Christians were distinct social groups. Early Christians often resented the Jews, since Jewish leaders rejected the belief that Jesus Christ was the Messiah.

 

Because they rejected the messianic status of Jesus, Jews were persecuted across Europe. Sometimes these persecutions devolved into mob murders or pogroms. Pogroms became more common during the Late Medieval Era, both in Iberia and in the rest of Europe. The Conversos would emerge from Jewish communities forced to accept the supremacy of the Catholic Church in the 15th century.

 

A Persecutory Turn

domingo ram zacharias and the angel
Panel with the Angel Appearing to Zacharias, by Domingo Ram, c. 1464-1507. Source: The Metropolitan Museum of Art

 

Anti-Jewish sentiment was already prevalent during the Late Middle Ages. Since religious scriptures forbade Christians from engaging in certain economic activities, such as moneylending, those jobs fell on Jews. A few wealthier Jews were actually employed in Christian kings’ courts. Yet the relative financial success of some Jews only fueled the hatred that ordinary Christians already felt toward them.

 

Medieval Christianity did not only hold the Jews responsible for rejecting Jesus Christ—it was also supersessionist. This meant that theologians believed the messages of Judaism had been fulfilled (and replaced) by the gospel of Jesus. To Christian clerics, the Jews defied the will of God and deserved punishment.

 

The Conversos in Spain

alfonso x king
Scene from the Book of Games depicting Alfonso X of Castile, 1283. Source: Wikimedia Commons

 

In the 14th century, authorities in Spain started to devote considerable attention to the Jewish communities in their domains. They wanted to solidify their own power in both the religious and secular spheres. So their initial ideas revolved around converting Jews en masse to the Catholic Church. These campaigns would mark the birth of a new category of people in medieval Spain: the Conversos.

 

The word converso refers specifically to a Jewish person who converted to Christianity. Some Jews did convert to Catholicism voluntarily, but more were coerced into converting. Christian authorities believed this was a viable way to rid the world of a “false” religion and save Jewish souls.

 

auto de fe spain conversos
Saint Dominic Presiding Over an Auto de Fé, by Pedro Berruguete, 1490s. Source: Museo Nacional del Prado, Madrid

 

Over time, attitudes toward the Conversos took a darker turn. In 1391, pogroms in the kingdoms of Castile and Aragon saw thousands of Jews murdered. These pogroms—egged on by an archdeacon named Ferrand Martínez—were condemned by civil authorities, but they reflected widespread attitudes toward the Jewish presence at the end of the 14th century.

 

In the 15th century, more Conversos genuinely professed Catholicism. Yet they could not shake the “taint” of their Jewish ancestry. Spanish Christians feared the Jewish newcomers as potential subversives. The doctrine of limpieza de sangre (purity of blood) developed as a reaction to the growth of the Conversos. Legal statutes labeled Conversos as “New Christians,” in opposition to “Old Christians” with long Catholic lineages. Religious hatred started to morph into ethnic hatred.

 

conversos proposal spain
The Proposal of the Jews to Ferdinand and Isabel, by Solomon Alexander Hart, 1870. Source: Mutual Art

 

Life was not exclusively difficult for Jewish communities, though. Historian Mark Meyerson argues that one Jewish community in Valencia, called Morvedre, actually recovered and thrived during the 1400s (Meyerson, 2004). Jews and Conversos in Morvedre forged new social and economic relationships, both with Old Christians and with each other.

 

Overall, the end of the 15th century was marked by the decline of the Conversos’ status. King Ferdinand II and Queen Isabel I united the Spanish kingdoms for the first time after 1469. They wanted to solidify Catholic supremacy and saw the Conversos as dreaded enemies. The Spanish Inquisition was created to enforce Catholic orthodoxy and royal authority. Conversos suspected of retaining Jewish practices faced especially severe punishments at the inquisitors’ hands.

 

In March 1492, the Spanish Crown officially declared that all Jews were to be expelled. Some Conversos remained but thousands fled Spain altogether.

 

The Crackdown on Conversos in Portugal

portugal jews conversos expulsion
Expulsion of the Jews, from the Quadros da História de Portugal, by Alfredo Roque Gameiro, 1917. Source: Tribos de Pinceis

 

Compared to Spain, the persecution of Jews in Portugal wasn’t as intense at first. Thousands of Spanish Jews actually escaped westward to Portugal after 1492. But their new refuge would prove fleeting. Potent anti-Jewish attitudes existed in Portugal, too.

 

The Portuguese King Manuel I issued a decree in 1497 authorizing the mass conversion of Jews. Manuel’s motives for issuing the edict are not entirely clear, but older scholars believed he had been pressured by the Spanish monarchy. Regardless of the king’s reasoning, his decree made life even more difficult for Portugal’s Jewish and Converso communities.

 

The bloodiest outbreak of violence against Conversos occurred at a church in Lisbon in April 1506. Conflict among parishioners—Old Christians and New Christians—led to thousands of Conversos being murdered over the course of three days. King Manuel allowed Portuguese Jews to emigrate after this, but only briefly. His successor, João III, created his own Inquisition in 1536 and intensified persecution.

 

sao tome principe highlighted map conversos
Sao Tome and Principe, off the coast of West Africa. Source: Wikimedia Commons

 

The persecution of the Conversos extended to Portugal’s new overseas territories. Manuel I punished hundreds of rebellious Conversos, including children, by abducting them and shipping them off to São Tomé and Príncipe, off the coast of Africa. Many of these deportees died. Yet some São Tomé Conversos survived and had children with enslaved Africans. Portuguese chroniclers did not fail to note their multiracial children.

 

São Tomé would be a thorn in the side of Portuguese authorities for hundreds of years. A document from 1632 describes the death of the local bishop. Notably, the author accused “New Christians” of poisoning the bishop. He decried the alleged prevalence of Jewish rituals among the island’s Conversos (Newitt, 2010). However, it is difficult to separate the author’s biases from his understanding of events.

 

Where Did the Conversos Flee To?

baruch spinoza philosopher
Portrait of Baruch de Spinoza, by Franz Wulfhagen, 1664. Source: Feel the Art

 

Spain and Portugal weren’t safe. So where could Iberian Jews and Conversos flee to? Their destinations would span the entire European continent and beyond.

 

The Netherlands was one of the most popular destinations. Compared to other places in pre-modern Europe, the Netherlands (especially Amsterdam) was renowned for its religious pluralism. The Dutch Reformed Church coexisted with other Christian denominations, as well as some non-Christians. Relations between the Conversos and Dutch authorities changed over time, alternating between acceptance and tension. One of the most renowned (and controversial) philosophers of the 17th century, Baruch de Spinoza, came from a Portuguese Converso family.

 

bayezid ii
Sultan Bayezid II, by Paolo Veronese, 1528-88. Source: Bavarian State Painting Collection

 

Another destination for fleeing Conversos was the Ottoman Empire. The Islamic Ottomans did persecute their non-Muslim subjects, but the extent of this persecution seemingly did not match the violence of Christian Europe. The Ottoman Sultan Bayezid II (r. 1481-1512) had economic reasons for welcoming the Jews and Conversos as well. Many exiled Iberian Jews had financial experience, and the sultan was keen on exploiting whatever he could to undermine his Christian adversaries.

 

Smaller numbers of Conversos journeyed even farther afield for the Spanish and Portuguese American colonies. Officially, they weren’t allowed to travel overseas, but enforcement was not consistent. Mexican Inquisition records attest to a Converso presence in Spanish America during the first century of colonization. Conversos also settled in Brazil. Everywhere they went, they had to carefully balance their dual religious identities.

 

Bibliography/Further Reading

 

Meyerson, Mark D. A Jewish Renaissance in Fifteenth-Century Spain. Princeton, NJ: Princeton University Press, 2004.

 

Newitt, Malyn, ed. The Portuguese in West Africa, 1415-1670: A Documentary History. Cambridge, UK: Cambridge University Press, 2010.

photo of Greg Pasciuto
Greg PasciutoBA History

Greg is a Massachusetts-based writer whose curiosity has always felt unquenchable. He is intrigued by stories from societies across time and around the world, regardless of geographic boundaries. His historical interests are particularly centered on the history of religion and the interactions of different cultural groups.