Answer:
Option: 1,000
Step-by-step explanation:
The Roman Catholic Church unified Christianity in Europe for one thousand years. Constantine became the first Roman emperor to accept Christianity and declared the empire's religion. The proclamation of the Edict of Milan helped to spread Christianity in other parts of the Empire and in Europe. The Catholic Church with its teaching and greatness received a powerful bond which gave religious unity. The church helped in stabilizing of social relations in society. The Pope was the head of the Catholic Church where all the ecclesiastical appointments made by him.