The first Christians were Jews, and still kept meeting in Temple on Sabbath, but when Judaism kicked them out, early on, Apostles changed to meeting on Lords day, Sunday!
You need to wake up and see who it was that changed the Sabbath, it was the apostate church and then it crowned its bishop to the level of Caesar. Look in history, and you will find the papal title Pontifex Maximus can be traced back to Babylon. The Babylon Kings, served as both king and priest of the pagan Babylonian Mystery religion, As priests, they bore the title "Pontifex Maximus" or "Supreme Pontiff," meaning "supreme pathfinder" or "bridge maker," which basically claims they were "the path or connection between this life and the next"
When Medo-Persia conquered Babylon, the Babylonian pagan religion was maintained, but after a disagreement that led to a revolt of the priesthood, the priests of Babylon were driven out of Medo-Persia, and they set themselves up at Pergamum, taking with them their titles and vestures. They pretty much continued their reign there as priest-kings of Babylonian paganism.
History shows how pontiff king of Pergamum Attalus III, bequeathed his title to the emperor of Rome in 133 BC and the kingdom of Pergamum merged with the Roman Empire along with what the scripture calls Satan throne and idol worship and its title "Pontifex Maximus".
Revelation 2:12-14King James Version (KJV)
12 And to the angel of the church in Pergamos write; These things saith he which hath the sharp sword with two edges;
13 I know thy works, and where thou dwellest, even where Satan's seat is: and thou holdest fast my name, and hast not denied my faith, even in those days wherein Antipas was my faithful martyr, who was slain among you, where Satan dwelleth.
14 But I have a few things against thee, because thou hast there them that hold the doctrine of Balaam, who taught Balac to cast a stumblingblock before the children of Israel, to eat things sacrificed unto idols, and to commit fornication.
In the fourth century AD, Christian emperor Gratian refused the title, and in the year 431 AD, the title was taken over by Damascus, bishop of Rome. By this time, the Roman bishops had advanced in political power, and so Bishop Damasus was elected Pontifex Maximus, becoming the official pagan Babylonian priest seated on Satan's throne in Rome. As such, the bishop converted the pagan temples of Rome into Christian churches and introduced the worship of pagan Babylon with its rites and rituals and pagan sacraments. History has what is considered the "overnight" conversion of pagan Romans to Christianity, which in actuality, the Roman pagans did not convert to Christianity, but rather the bishop Damasus exercised his authority as head of' Babylonian paganism in Rome, and replaced all the Christian elders with pagan priests and continued the practice of the pagan Babylonian Mystery religion and began its spread to all areas of the old Roman Empire.
The present-day college of cardinals with the Pope at the head is identical to the college of pontiffs from Babylon and Ancient pagan Rome with the Pontifex Maximus at the head.
The keys that the Pope wears around his neck are not the keys of Peter. Rather, they date back from Babylonian times, when it was supposed that this representative of God had the power to unlock heaven or hell. All the rituals and pomp and ceremony basically that existed in ancient Babylon has now been picked up and put into practiced as Roman Catholic Christianity.
You can search history and find what happened. Here is a statement about the Popes position as the pagan priest who is the Pontifex Maximus:
"The Emperor is no more...but the Pontifex Maximus abides; he is now the Vicar of Christ, offering the old civilisation to the tribes of the North. He converts them to his creed, and they serve him as Father and Judge supreme" William Barry's 'The Papal Monarchy'.
Seems like the priests of Babylon continue in this new guise..