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Auto - da - fe
Auto de fé in medieval Spanish (and in Portuguese) means "act of faith". The phrase is used most frequently in English in its alternative Portuguese form auto-da-fé.

In the popular imagination, "auto-da-fé" has come to refer to burning at the stake for heresy.

( This is an answer for those of you who were looking for the " autodafe " to understand a bit more of The Mars Volta 's lyrics. )

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"Stained walks crutch in hobbled sway
Autodafe (auto.da.fe)
A capulary hint of red"

"Mel Brooks' movie History of the World, Part I (1981) featured a passage set in the Spanish Inquisition Torquemada (Brooks) had the following musical exchange with his monks:

-Auto Da Fé, what's an Auto Da Fé?

-It's what you oughtn't to do but you do anyway!"
by Smawrt June 12, 2009