By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What other title is given this revelation of God to man?
In what way is this comparison further explained?
What assurance is given concerning the unfailing power of the Creator?
6. Under the influence of her tender care and faithful instruction, what is said of the child life of Jesus?
How often will they congregate to worship the Lord?
5. In what instruction to His disciples did Christ recognize the existence of the Sabbath long after His ascension?
What encouragement is given to heed this message?

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