Auto-da-fe. An auto-da-fé or auto-de-fé was the ritual of public penance of condemned heretics and apostates that took place when the Spanish Inquisition, Portuguese Inquisition or the Mexican Inquisition had decided their punishment, followed by the carrying out by the civil authorities of the sentences imposed.
   The most extreme punishment imposed on those convicted was execution by burning. In popular usage, the term auto-da-fé, the act of public penance, came to mean burning the convicted person at the stake, although that was a punishment for only the most serious offenses.
   The first recorded auto-da-fé was held in Paris in 1242, under Louis IX. On 1 November 1478, Ferdinand II of Aragon and Isabella I of Castile received permission from Pope Sixtus IV to name Inquisitors throughout their domains, to protect Catholicism as the true faith. It originally applied to the Crown of Castile, the domain of Isabella, but in 1483, Ferdinand extended it to his domain of the Crown of Aragon.
   Ferdinand's action met with great resistance, and resulted in the assassination by conversos in 1485 of Pedro de Arbués. In spite of this social discontent, in the following years between 1487 and 1505 the Chapter of Barcelona processed more than 1,000 people, of whom only 25 were absolved.
   The monarchs immediately began establishing permanent trials and developing bureaucracies to carry out investigations in
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