By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Upon what basis does the reward come to one who works?
What was the result of Christ's working miracles at His first passover?
Who opens the judgment and presides over it?
Before coming to Sinai, what had Moses taught Israel?
What will this prophet do when he comes?
What appeared upon the opening of the second seal?
Does God willingly afflict the children of men?

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