"During the first five centuries or so of Christianity, a number of false teachings, called heresies, about Jesus arose in the church. They clustered into two main categories: one that denied Jesus' humanity, the other that denied his divinity." (Pennock, M.F. The Seeker's Catacheism; pg. 17)
Image: "St. Augustine and St. Monica"
Other UST Library Research Guides may also provide you with general historical information and sources.