The politico-religious struggle between Gregory VII and Henry IV is known as the Investiture Contest (or sometimes the Investiture Controversy) but was not limited solely to Henry and Gregory - other Popes/ecclesiastical figures and aristocrats were involved - nor was it even limited to their lifetimes. The Investiture Contest was an 11th-12th century development, and part of what is now often referred to as the Gregorian Reforms.
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Henry J. Anslinger
Here are a few medieval saints: Agnes Alfred the Great Anselm of Canterbury Augustine of Canterbury Benedict Bernard Bridget of Sweden Christina the Astonishing Columba Cuthbert of Lindisfarne David of Wales Dominic Edward the Confessor Edward the Martyr Francis of Assisi Genevieve Gregory of Tours Gregory I Henry II of the Holy Roman Empire Hedwig of Poland (Jadwiga) Hildebrandt Hildegard of Bingen Joan of Arc Leo the Great Leo III Louis IX of France Margaret of Hungary Margaret of Scotland Stephen of Hungary Thomas Aquinas Thomas Becket Wenceslaus
Rajaram Mohan Roy
Middle Age
ancient egyptians :D There has always been 365 1/4 days in a year. Thats a physical fact, that no one can alter. How it is divided up into months, is arbitary. Our modern calendar was formulated by pope Gregory and is known as the Gregorian calendar.