The earliest known case judging Limpieza de Sangre comes from the Church of Cordoba, that explained the procedure to judge the purity of blood of a candidate as follows: Kneeling, with his right hand placed over the image of a crucifix on a Bible, the candidate confirmed themselves as not being of either Jewish or Moorish extraction. Then the candidate provided the names of their parents and grandparents, as well as places of birth. Two delegates of the council, church or other public place would then research the information to make sure it was truthful.