As a result of the Alhambra Decree and 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.