"Ecclesiastical History," commonly known as "Church History," is a significant work by Eusebius of Caesarea, often regarded as the "Father of Church History." Written in the early fourth century, this historical and theological masterpiece provides a comprehensive account of the early Christian Church, tracing its development from its origins to the time of Emperor Constantine.

"Of Predestination" is a theological treatise by Zacharias Ursinus, a prominent Reformed theologian and one of the primary authors of the Heidelberg Catechism. In this work, Ursinus delves into the complex doctrine of predestination, exploring the concept of God's sovereign choice in election and its implications for human salvation.

"Grace Abounding to the Chief of Sinners" is an autobiographical work by John Bunyan, the renowned English Puritan preacher and author of "The Pilgrim's Progress." In this book, Bunyan provides a deeply personal account of his spiritual journey, struggles, doubts, and eventual redemption, highlighting the transformative power of God's grace in his life.

"Of Faith and of the Creed" is a work by Augustine of Hippo, a prolific theologian and philosopher of the early Christian Church. In this treatise, Augustine explores the significance of faith and delves into the interpretation of the Nicene Creed, a statement of Christian belief that outlines the core doctrines of the faith.

"Concerning Grace and Free Will" is a theological treatise by Bernard of Clairvaux, a prominent figure in the medieval Christian Church and a renowned Christian Cistercian monk. This work addresses the complex interplay between divine grace and human free will within the context of salvation and the Christian life.

Gregory of Nyssa, a prominent Church Father and theologian of the 4th century, made significant contributions to the development of Trinitarian theology. His teachings on the doctrine of the Trinity emphasized the unity and distinctiveness of the Father, Son (Jesus Christ), and Holy Spirit within the Godhead. Here are some key aspects of Gregory of Nyssa's teachings regarding the Trinity:

Gregory of Nyssa, one of the influential Church Fathers of the 4th century, wrote three treatises that explore essential theological topics: "On The Holy Trinity," "Of The Godhead," and "Of The Holy Spirit." These works are foundational contributions to the development of Trinitarian theology and the understanding of the nature of God within early Christianity.

"On Dialogue of Polygamy" is a controversial work written by Bernardino Ochino, an Italian Capuchin friar and preacher during the 16th century. The dialogue is a fictional conversation between two characters, Fabrizio and Ottavio, discussing the practice of polygamy.