We just learned about the wise man Saint Augustine of Hippo.
Another part of early Christianity is Mariology.
This is the study of Mary the mother of Jesus, and exactly who she was and how she gave birth to Jesus.
In 431 AD, a bunch of people met at the city of Ephesus, which is now in Turkey.
They met together because there were people who did not agree on what Mary should be called, and what Jesus was like as a baby.
Some people thought she should be called "Theotokos" which means Mother of God, and others thought she should be called "Christotokos" which means Mother of Christ.
This might not seem like a big deal, but at the time people were still arguing about whether Jesus was a God and Man as one person, or whether he was like a person who also had a separate God personality living inside him.
About 250 different church leaders showed up to argue about this, and they decided she should be called Theotokos, Mother of God.
After this time there were a lot of other people talking about who Mary was, and what her life was like, so this became known as the study of Mariology.
(from: wikipedia - mariology)
Kid Facts - Blast from the past: Apollos - Bishop of Cæsarea
