The most intense period of persecution of "conversos" lasted until 1530. From 1531 to 1560, however, the percentage of "conversos" among the Inquisition trials dropped to 3% of the total. There was a rebound of persecutions when a group of crypto-Jews was discovered in Quintanar de la Orden in 1588; and there was a rise in denunciations of "conversos" in the last decade of the sixteenth century. At the beginning of the seventeenth century, some "conversos" who had fled to Portugal began to return to Spain, fleeing the persecution of the Portuguese Inquisition, founded in 1536. This led to a rapid increase in the trials of crypto-Jews, among them a number of important financiers. In 1691, during a number of "autos-da-fé" in Majorca, 37 "chuetas", or "conversos" of Majorca, were burned.