As a result of the Alhambra Decree of 1492 and the religious repression by the Holy Office of the Inquisition, many Sephardim (Spanish and Portuguese Jews) left the Iberian peninsula at the end of the 15th century and throughout the 16th century, in search of religious freedom. Some migrated to the newly independent Dutch provinces which welcomed the Sephardic Jews. Many of the Jews who left for the Dutch provinces were crypto-Jews, persons who had converted to Catholicism but continued to practice Judaism in secret. After they had settled in the safety of the Netherlands, many of them 'returned' fully to practice of the Jewish religion. State of community prior to large scale migration Many Jewish refugees came from Portugal, where Spanish Jews had fled after the Spanish Inquisition had been introduced in Spain in 1478, followed by the expulsion of the Jews from Spain in 1492. In 1497, the Portuguese forcibly converted all Jews in Portugal, including many who had returned to Judaism after fleeing Spain and its Inquisition. Following the establishment in 1536 of the Portuguese Inquisition, descendants of Jews who had converted to Catholicism dating back to a forced conversion in Spain in 1391 through the Portuguese forced conversion, were looked upon with great suspicion. In search of greater religious and economic freedoms, many crypto-Jews left Portugal for places with more lenient religious legislation and opportunities where their unique skill-sets could thrive. Many left for Brazil (where Europeans were Portuguese speaking) and France. A couple of decades later, groups of crypto-Jews started reaching the Dutch Republic. Migration to Amsterdam Amsterdam became one of the most favored destinations in the Netherlands for Sephardic Jews. Because many of the refugees were traders, Amsterdam benefited greatly from their arrival. However, the reason to settle in Amsterdam was not merely voluntary; many crypto-Jews, or Marranos, had been refused admission in trading centers like Middelburg and Haarlem, and because of that ended up in Amsterdam. Under the influence of Sephardic Jews, Amsterdam grew rapidly. Many Jews supported the House of Orange, and were in return protected by the stadholder. Relationship with Amsterdam officials Many types of discriminatory laws commonplace elsewhere and previously in medieval times were not in place in Amsterdam; to the extent such laws were on the books, they weren't always followed strictly. In part, such general religious toleration arose before Jews came to Amsterdam, as city officials adopted a