By what authority was Sunday Sabbath-keeping instituted?

Answer

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

14. What was the next step in their plan to secure lawful authority to carry out their unlawful purpose?
Who minister to God, and assist in the judgment?
Where were the Ten Commandments placed?
Where did John, in vision, see the saints?
What encouragement is given to heed this message?
How long do the other class wait after the first resurrection before they are raised?
Of whom does the Bible teach that God is a rewarder?

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