Greek, Roman, and Renaissance vs. Hebrew, Christian, and Medieval

The Decameron and The Canterbury Tales seem to have a closer outlook to the Greek and Roman literature than the Hebrew, Christian, early Medieval, and late Medieval literature.  The Hebrew literature is the Old Testament, the Christian is the New Testament, the some of the early and late Medieval literature are The City of God, and The Little Flowers of St. Francis.  The Decameron and The Canterbury Tales were written in the time of the Early Renaissance when some people started moving a bit away from Christianity (although very many people still believed in God and Jesus Christ as the source of the full potential of man) and started reading more of the Roman and Greek literatures.

The Church and the Gregorian Reform

In the tenth- and eleventh- centuries, the Church become under what is known as Lay Control.  Lay Control is when authority takes control over some business, agency, etc.  In this case, the local lords controlled the Church.  This led the Church to become a part in the feudal system.  Then all of this signals Pope Leo IX to take a stand and do something.  Later in the eleventh-century, we then see St. Gregory VII, whom the Gregorian Reform was named after, in a fight with the emperor of Germany, Henry IV.  And finally, Christendom and its meaning.