HE IS ONE OF THE GREATEST FATHERS OF THE ORTHODOX CHURCH: Today we celebrate Saint Photius of Constantinople
These saints were not brothers by blood, but they were brothers by spirit.

TL;DR
- Saint Photius of Constantinople, a significant figure in the Orthodox Church, is celebrated on February 19th.
- He served as Patriarch of Constantinople from 858-867 and again from 877-886.
- He is renowned as one of the most learned Byzantine theologians and a prominent leader of the Patriarchate.
- Photius advocated for the Orthodox teaching on the procession of the Holy Spirit from the Father, opposing the 'Filioque' clause.
- He played a crucial role in launching the mission of Saints Cyril and Methodius to the Slavs.
- Despite his reluctance, he was appointed Patriarch, facing challenges of being deposed and reinstated.
- He is recognized as a defender of the Church against papal overreach and deviations from faith.
- He is considered the 'father of Church unity' for his efforts to preserve it.
- He passed away in 891.