By what authority was Sunday Sabbath-keeping instituted?

Answer

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

For what is all Scripture profitable?
How is Christ's resurrection foretold in the Psalms?
2. After being threatened with death if they did not make known the dream and the interpretation, what did the wise men say to the king?
How many lawgivers are there?
7. What, according to Matthew's account, did Christ say were to he the signs in the sun, moon, and stars?
What shows that the actions of men are recorded?
How did Job treat the poor?

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