Ad extirpanda

Ad extirpanda
Latin for 'To eradicate'
Papal bull of Pope Innocent IV
Signature date 15 May 1252
SubjectOn the use of torture against heretics

Ad extirpanda ("To eradicate"; named for its Latin incipit) was a papal bull promulgated on Wednesday, May 15, 1252 by Pope Innocent IV which authorized under defined circumstances the use of torture by the Inquisition as a tool for interrogation.