If you are a student of the Scriptures, specifically Daniel and Revelation, you will see for yourself.
There is no Papacy in the Scriptures, no purgatory, no worship of Mary...and on and on. I have watched on cland and ewtn, the worship of Mary. She was a sinner, that, is why, "And Mary said, My soul doth magnify the Lord, and my spirit hath rejoiced in God MY SAVIOUR." Lu 1:46,47.
A sign of The Antichrist is "...he thinks to change times and laws." Dan 7:25. He, only, "thinks to change," because no man/institution can overrule our Creator and change His law. There was, only, one time in His Covenant - the Sabbath.
I have four statements claiming, that, the change of the Sabbath is her "mark" of authority.
I have several statements made by the Catholic Church claiming to have made the change and abolished the Sabbath. Jesus referred to Himself as "The Lord of the Sabbath." Mt 12:8;Mr 2:28;Lu 6:5.
The children of Israel, Jesus, His disciples and the New Testament Christians kept the Sabbath holy. Jesus prophesied, that, the Sabbath would be kept during The Great Tribulation, and we are not there, yet. Mt 24:20.
God spoke through Isaiah that God's children will keep the Sabbath in His kingdom:
"For as the new heavens and the new earth, which I will make, shall remain before Me, saith the Lord, so shall your seed and your name remain. And it shall come to pass, that from one new moon to another, and from one Sabbath to another, shall all flesh come to worship before Me, saith the Lord." Isa 66:22,23.