the date of canonization for saint isidora is unknown. having lived before the sacred congregation of rites founded by pope sixtus v in 1588 (now the congregation for the causes of saints), the records of isidora's canonization have been lost if ever they existed. during isidora's life time, the process for canonization fell under pre-congregation, where designates for sainthood could be canonized by a local bishop or primate based on devotion, which is likely what took place with her cause.