- 
  
  December 25, 0
Jesus is born - 
  
  The first council of constantinople takes place
 - 
  
  March 19, 33
Pentecost - 
  
  June 9, 50
The Council of Jerusalem took place - 
  
  February 27, 249
Decius begins empire-wide persecussions - 
  
  March 15, 303
The Great Persecutions begin - 
  
  The battle of Milvian Bridge takes place
 - 
  
  May 27, 313
This is the reign of Emperor Constantine but also this is when the Editc of Milan was issued granting christians the freedom to practice their religion safely - 
  
  June 9, 325
The Council of Nice occurs - 
  
  July 9, 452
Pope Leo the Great - 
  
  August 9, 529
Saint Benedict begins his monastery - 
  
  September 9, 2590
Gregory I becomes pope - 
  
  October 9, 800
Pope Leo III crowns Charlemagne emperor