One Christian writer who lived most of the second century after Jesus, studied the Gospels under Polycarp who was a disciple of John the Apostle that wrote the book of John. This fellow knew many of the men that were taught by the 12 apostles and had become martyrs during a period of persecution of the Church.
His writings are considered one of the most important to the early church. He writes of the rule of the antichrist and its relation to Jesus' Second Coming.