By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Of what is faith a fruit?
What assurance has the believer of his union with God?
Does faith set aside the law of God?
By what are men sanctified?
What question did the disciples then ask?
6. In His reply, how did Christ indicate that neither the end of the world nor of the Jewish nation was immediately at hand ?
What was shown the Apostle John in vision?

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