By what authority was Sunday Sabbath-keeping instituted?

Answer

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

To whom is our worship justly due?
What fate awaits blind teachers and their followers?
14. What was the next step in their plan to secure lawful authority to carry out their unlawful purpose?
What was to be the nature of the next kingdom after Babylon?
What is the whole world called upon to do?
Was the ceremonial law a complete law in itself?
What experience followed this trust in Jesus?

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