Theodosius also called Theodosius I and Theodosius the Great, was Roman Emperor from 379 to 395. Reuniting the eastern and western portions of the empire, Theodosius was the last emperor of both the Eastern and Western Roman Empire. After h...

Saint Jerome was an Illyrian Latin Christian priest, confessor, theologian and historian, who also became a Doctor of the Church. He was the son of Eusebius, of the city of Stridon, on the border of Dalmatia and Pannonia. He is best known f...

Augustine of Hippo was an early Christian theologian and philosopher from Numidia whose writings influenced the development of Western Christianity and Western philosophy. He was the bishop of Hippo Regius in north Africa and is viewed as o...

Pope Leo I or Leo the Great, was pope of the Roman Catholic Church from September 29, 440 to November 10, 461. He was a Roman aristocrat and the first Pope of the Roman Catholic Church to whom the title "the Great" was attached. He is perha...

Saint Patrick was a Romano-Briton and Christian missionary, who is the most generally recognised patron saint of Ireland (although Brigid of Kildare and Columba are also formally patron saints). Two authentic letters from him survive, from...

Saint Brigid of Kildare or Brigid of Ireland (Brigit, Bridget, Bridgit, Bríd or Bride) or Mary of the Gael is one of Ireland's patron saints along with Saints Patrick and Columba. Irish hagiography makes her an early Irish Christian nun, ab...

Dionysius Exiguus has left his mark conspicuously, for it was he who introduced the use of the Christian Era according to which dates are reckoned from the Incarnation, which he assigned to 25 March, in the year 754 from the foundation of R...

Saint Benedict of Nursia is a Christian saint, honored by the Roman Catholic Church as the patron saint of Europe and students. Benedict founded twelve communities for monks at Subiaco, about 40 miles (64 km) to the east of Rome, before mov...

Saint Columba, sometimes referred to as Columba of Iona, or, in Old Irish, as Colm Cille, Columbkill, Columbkille or Columcille (meaning "Dove of the church") was an outstanding figure among the Gaelic missionary monks who, some of his advo...

Saint Gregory of Tours was a Gallo-Roman historian and Bishop of Tours, which made him a leading prelate of Gaul. He was born Georgius Florentius, later adding the name Gregorius in honour of his maternal great-grandfather. He wrote in form...

Pope Saint Gregory the Great not only saved the Church, in times so frightful that the men who lived in them were sure that the end of the world was come, but he founded the great civilization which has lasted down to our day and of which...

Sophronius was the Patriarch of Jerusalem from 634 until his death, and is venerated as a saint in the Catholic Church and the Eastern Orthodox Church. Before rising to the primacy of the see of Jerusalem, he was a monk and theologian who...

Muhammad was the founder of Islam. According to Islamic doctrine, he was a prophet and God's messenger, sent to present and confirm the monotheistic teachings preached previously by Adam, Abraham, Moses, Jesus, and other prophets. He is vie...

Abu Bakr As-Siddiq, popularly known by his nickname Abu Bakr was a senior companion (Sahabi) and the father-in-law of the Islamic prophet Muhammad. He ruled over the Rashidun Caliphate from 632–634 CE when he became the first Muslim Caliph...

Umar, also spelled Omar, Umar ibn Al-Khattab, Umar Son of Al-Khattab, was one of the most powerful and influential Muslim caliphs (rulers) in history. He was a companion of the Islamic prophet Muhammad. He succeeded Abu Bakr (632–634) as th...