Pope Gregory the Great . Son of wealthy Roman senator Sales possessions to build seven monasteries Devotes his life to simple prayer Pope ask him to be his messenger to Constantinople Gregory writes important book that laid out important Christian ideas like Purgatory 590 becomes Pope.
the pope should rule in spiritual matters and the emperor in material affairs.
*Gregorian chant: religious music Latin based
on Scripture, no harmonies, no instruments
*Gregorian calendar still used today