By what authority was Sunday Sabbath-keeping instituted?

Answer

By the authority of the Catholic Church. See page 131.

In contrast with the pride and self-exaltation exhibited by Satan, what spirit did Christ manifest?
Through what was the original creation wrought?
If John, therefore, referred to a day of the week, on what day must he have been in the Spirit?
What promise did God leave for these persecuted ones?
19. Just before the pouring out of the plagues, what call does God send to His people still in Babylon?
What did He say to the woman of Samaria as to the source of salvation?
What will then he the condition of all the earth?

Questions & Answers are from the book Bible Readings for the Home Circle