Today, June 27th, we celebrate the Feast Day of St. Cyril of Alexandria.

Here’s what you need to know...

Cyril was a 5th century Egyptian bishop and theologian of the Early Church. 
Cyril was a leading figure in the Christological (study of the nature and being of Jesus) controversies of that time, especially the ones regarding the heretical teachings of Nestorius, the Archbishop of Constantinople. 
Nestorius taught that in Christ there were two persons, one human and one divine. Nestorius also would not agree to the title Theotokos or “God-bearer” for Mary. He argued Mary should be referred to simply as “Christ-bearer”. 
At the Council of Ephesus in 431, Cyril, in attendance as the Pope’s representative, condemned Nestorius and proclaimed Mary truly the “God-bearer”—the mother of the one Person who is truly God and truly human. 
Cyril spent much of the rest of his life writing and clarifying the doctrines of the Trinity and the Incarnation of Jesus Christ.  
For his this work and his spirited fight for the title Theotokos, Cyril was declared a doctor of the Church by Pope Leo XIII in 1882.  
St. Cyril of Alexandria, ora pro nobis. 
Happy Feast Day everybody!