Besides the Bible there are a number of works which have greatly influenced Catholic theology. One of these works is De civitate Dei (‘About the City of God’), written by Church Father Augustine in the beginning of the 5th century. In this work he describes the conflict between two cities: the earthly city and the city of God. Many handwritten copies of De civitate Dei from the Middle Ages have survived. One of the most beautiful, illuminated examples is Ms. 42 in Utrecht University Library, which once belonged to a Dutch nobleman.