By what authority was Sunday Sabbath-keeping instituted?

Answer

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

How did the aged prophetess Anna express herself at the sight of Jesus?
17. After having made atonement for the people in the most holy place, what did the high priest next do?
What was the song of Moses?
What directions were given by Constantine's Sunday law of March 7, 321?
What is the bond of perfection?
What gives us the victory in our conflict with the world?
What does Paul say God has prepared for His people?

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