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470 - 544
  Dionysius, Introduction 'Anno Domini'  
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...
 
 
675 - 754
  Saint Boniface, Murdered near Dokkum  
Born to a noble family of Wessex, England, as Wynfrid or Wynfrith, Boniface (in Latin, Bonifatius) is known as the "Apostle of Germany" for his work in Christianizing that country. First a benedictine monk and then ordained as a pr...
 
    Guido d'Arezzo, Iventor Musical Notation  
Guido of Arezzo (991/992 – after 1033) was a music theorist of the Medieval era. He is regarded as the inventor of modern musical notation (staff notation) that replaced neumatic notation; his text, the Micrologus, was the second-most-widel...
 
    Jeanne d'Arc (Joan of Arc), The Maid of Orléans  
Joan of Arc (French: Jeanne d'Arc), nicknamed "The Maid of Orléans" (French: La Pucelle d'Orléans), is considered a heroine of France for her role during the Lancastrian phase of the Hundred Years' War and was canonized as a Roman Catholic...
 
    The Society of Jesus, Jesuits  
The Society of Jesus is a Christian male religious congregation of the Catholic Church. The members are called Jesuits. The society is engaged in evangelization and apostolic ministry in 112 nations on six continents. Jesuits work in educat...
 
    Wilberforce, Slave Trade Act 1807  
William Wilberforce was a British politician, a philanthropist and a leader of the movement to abolish the slave trade. A native of Kingston upon Hull, Yorkshire, he began his political career in 1780, eventually becoming the independent Me...
 
    Gregor Mendel, Father of Genetics  
Gregor Johann Mendel was a Austrian priest and scientist, and is often called the father of genetics for his study of the inheritance of traits in pea plants. Mendel showed that the inheritance of traits follows particular laws, which were...
 
    Saint Bernadette of Lourdes  
Bernadette Soubirous was the firstborn daughter of a miller from Lourdes (Lorda in Occitan), France, and is venerated as a saint in the Catholic Church. Soubirous is best known for the Marian apparitions of a "young lady" who asked for a...
 
    Lemaître, Proposed Big Bang Theory  
Georges Lemaître was a Belgian Roman Catholic priest, honorary prelate, professor of physics and astronomer at the Catholic University of Leuven. He sometimes used the title Abbé or Monseigneur. Lemaître proposed what became known as the Bi...
 
       
         
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