By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What indwelling Power keeps such from sinning?
What basis for reconciliation was made by Christ's death?
Was it possible for Christ to be holden of death?
Was it God's design that all should possess the same gifts?
What do papal authorities say of the observance of Sunday by Protestants?
8. In what language did Christ briefly describe the experiences of His people previous to these calamities?
If one lacks wisdom, what is he told to do?

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