Apparently they were cannonized through acclamation, not infalible process.
I felt awkward reading some similar the other day:
Relics of the Magi? Are the Magi canonized as saints?
Kind of slipping in through the back door to sainthood I suppose.
I don't know, weren't they Zoroastrians?
Considering their relics are in the Catholic Cathedral in Cologne, your ignorance astounds me.
Most, if not all of the Saints who lived before the 11th century were canonized locally. Whatever the Magi were before Christ came is irrelevant. They adored him as God, and the tradition tells us that they were still living after Pentecost and were baptized by one of the apostles (St. Thomas?)
Sorry, I've never been to Cologne. And the story of the Magi was always strange to me.
These were magicians practicing a strange religion from the East, interpteting dreams and steeped in astrology. I never got the connection about how they became saints although we always celebrated their feast day on the Epiphany.
I have no problem with their conversion, only stated that they were Zoroasters at one time. Frankly, I don't know too much on what tradition says about them.