By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What was God's design in thus giving the Scriptures?
What condition is attained in obeying the truth?
For what did David pray?
What is it that makes a thing holy?
What will be done with the righteous living?
What was to follow the great earthquake?
What scene in heaven was presented to the prophet as the seventh trumpet was about to sound?

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