By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Upon how many of the human race did death pass as the result of Adam's transgression?
How fully did Israel once acknowledge their wrong doing ?
What promise is thus fulfilled?
What portion of this period was to reach to Christ, the Messiah, or Anointed One?
Under the theocracy, how were the rebellious or willful transgressors treated ?
By what law is the knowledge of sin?
How did David express himself on this point?

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