By what authority was Sunday Sabbath-keeping instituted?

Answer

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

In what working of God is faith to be exercised in connection with baptism?
What is the great purpose of Christ in His work of reconciliation?
What effect did this dream have upon Daniel?
What did Christ state as a condition of entering into life?
Of what did Christ say the Son of man is Lord?
What encouragement is given to study this book?
What did the Ephesians do upon hearing the gospel?

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