By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What is one purpose for which the Holy Spirit was sent?
Why did John write his testimony concerning God's love and purpose in giving Christ?
How is the character of the law described by the Apostle Paul?
What reason is given for making the new covenant?
What shows that the angels sent to Abraham and Lot were real beings?
What did He say to the woman of Samaria as to the source of salvation?
Why are its gates not to be closed?

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