Revelation 13:5 "And there was given unto him a mouth speaking great things and blasphemies;
The Catholic Church mixed Pagan Idolatry into the Christian Church.
Revelation 13:5 "and power was given unto him to continue forty and two months."
42 (Months) X 30 (days in a month) = 1260.
This is the same 1260 we see in Daniel 7.
The time period when the Papacy had political power.
(Letter of the Emperor Justinian, Victorious, Pious, Happy, Renowned, Triumphant, always Augustus, to John, Patriarch, and most Holy Archbishop of the fair City of Rome)
...because you are the head of all the Holy Churches, for We shall exert Ourselves in every way (as has already been stated), to increase the honor and authority of your See.
Besides Justinian wiping out nontrinitarian tribes, making laws to give power to the Papacy, he also built Hagia Sophia the central church where new emperors were crowned.
Rev 13:6 "And he opened his mouth in blasphemy against God, to blaspheme his name, and his tabernacle, and them that dwell in heaven."
The Papacy does this placing herself as God.
Revelation 13:7 "And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues, and nations."
Millions were killed by the Catholic Church during the Middle Ages.
Rev 13:8 "And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world."
Who Will you Serve?
Rev 13:9 "If any man have an ear, let him hear."
1843 Chart (By Charles Fitch and Apollos Hale)
1850 Chart (By Otis Nichols)