Massacre of 1391 in the context of "Expulsion of the Jews from Spain"

Sephardic Jews, also known as Sephardi Jews or Sephardim, and rarely as Iberian Peninsular Jews, are a Jewish diaspora population associated with the historic Jewish communities of the Iberian Peninsula (Spain and Portugal) and their descendants. The term "Sephardic" comes from Sepharad, the Hebrew word for Iberia. These communities flourished for centuries in Iberia until they were expelled in the late 15th century. Over time, "Sephardic" has also come to refer more broadly to Jews, particularly in the Middle East and North Africa, who adopted Sephardic religious customs and legal traditions, often due to the influence of exiles. In some cases, Ashkenazi Jews who settled in Sephardic communities and adopted their liturgy are also included under this term. Today, Sephardic Jews form a major component of the global Jewish population, with the largest population living in Israel.

The earliest documented Jewish presence in the Iberian Peninsula dates to the Roman period, beginning in the first centuries CE. After facing persecution under the Pagan and later Christian Visigothic Kingdom, Jewish communities flourished for centuries under Muslim rule in Al-Andalus following the Umayyad conquest (711–720s), a period often seen as a golden age. Their status declined under the radical Almoravid and Almohad dynasties and during the Christian Reconquista. In 1391, anti-Jewish riots in Castile and Aragon led to massacres and mass forced conversions. In 1492, the Alhambra Decree by the Catholic Monarchs expelled Jews from Spain, and in 1496, King Manuel I of Portugal issued a similar edict. These events led to migrations, forced conversions, and executions. Sephardic Jews dispersed widely: many found refuge in the Ottoman Empire, settling in cities such as Istanbul, Salonica, and İzmir; others relocated to North African centers like Fez, Algiers, and Tunis; Italian ports including Venice and Livorno; and parts of the Balkans, the Levant (notably Safed), and the Netherlands (notably Amsterdam). Smaller communities also emerged in France, England, and the Americas, where Sephardim often played key roles in commerce and diplomacy.

The Alhambra Decree (also known as the Edict of Expulsion; Spanish: Decreto de la Alhambra, Edicto de Granada) was an edict issued on 31 March 1492 by the joint Catholic Monarchs of Spain, Isabella I of Castile and Ferdinand II of Aragon, ordering the expulsion of unconverted Jews from the Crowns of Castile and Aragon and its territories and possessions by 31 July of that year. Its primary purpose was to eliminate the influence of the remaining Jews on Spain's large converso New Christian population, converted from Judaism, to minimize the possibility that the latter and their descendants would be able to secretly practice their former faith.

Over half of Spain's Jews had converted as a result of the religious persecution and pogroms which occurred in 1391. Due to continuing attacks, around 50,000 more had converted by 1415. A further number of those remaining chose to convert to avoid expulsion. As a result of the Alhambra Decree and persecution in the years leading up to the expulsion of Spain's estimated 300,000 Jewish origin population, a total of over 200,000 had converted to Catholicism in order to remain in Spain, and between 40,000 and 100,000 remained Jewish and suffered expulsion. An unknown number of the expelled eventually succumbed to the pressures of life in exile away from formerly-Jewish relatives and networks back in Spain, and so converted to Catholicism to be allowed to return in the years following expulsion.

The persecution of Jews is a major component of Jewish history, and has prompted shifting waves of refugees and the formation of diaspora communities around the world. The earliest major event was in 597 BCE, when the Neo-Babylonian Empire conquered the Kingdom of Judah and then persecuted and exiled its Jewish subjects. Antisemitism has been widespread across many regions of the world and practiced by many different empires, governments, and adherents of other religions.

Jews have been commonly used as scapegoats for tragedies and disasters such as in the Black Death persecutions, the 1066 Granada massacre, the Massacre of 1391 in Spain, the many pogroms in the Russian Empire, and the ideology of Nazism, which led to the Holocaust, the systematic murder of six million Jews during World War II.

The House of Trastámara (Spanish and Aragonese: Casa de Trastámara) was a royal dynasty which first ruled in the Crown of Castile and then expanded to the Crown of Aragon from the Late Middle Ages to the early modern period.

They were an illegitimate cadet line of the House of Burgundy who acceded to power in Castile in 1369 as a result of the victory of Henry of Trastámara over his half-brother Peter I in the 1351–1369 Castilian Civil War, in which the nobility, and, to a lesser extent, the clergy had played a decisive role in favour of the former. The resulting dynastic change saw a radicalization of the antisemitic sentiment in Castile, converging religious doctrinal anti-Judaism, aristocratic political antisemitism, and popular antisemitism exacerbated by the ongoing economic and social crisis, which had its climax in the 1391 pogroms.

Crypto-Judaism is the secret adherence to Judaism while publicly professing to be of another faith; practitioners are referred to as "crypto-Jews" (origin from Greek kryptos – κρυπτός, 'hidden').

The term is especially applied historically to Spanish and Portuguese Jews who outwardly professed Catholicism, also known as Conversos, Marranos, or the Anusim. The phenomenon is especially associated with medieval Spain, following the Massacre of 1391 and the expulsion of the Jews in 1492. After 1492 in Spain and 1497 in Portugal, officially they no longer existed. The Spanish Inquisition and the Portuguese Inquisition were established to monitor converted Jews and Muslims and their descendants for their continued adherence to Christian faith and practice, with severe penalties for those convicted of secretly continuing to practice their original beliefs. This would have involved the Inquisition paying close attention to the households of suspected converted Jews, since most of the families still practicing Judaism would have done so through the food. Information about secretly observant Jews largely survives in Inquisition cases against individuals.