By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What did Christ say to the Jews concerning the study of the Scriptures?
What was required in order to effect this reconciliation?
What is assured to the believer in Christ?
What solemn charge was given him concerning his public work?
Where was Daniel at this time?
What comforting promise has God made concerning the sleeping saints?
What is the condition of one who lacks these graces?

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