By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What test should therefore be applied to every professed teacher of truth?
What does the sorrow of the world do?
What do those born of God not do?
What did some of the people do on the seventh day?
Who is this dragon said to be?
What does Christ promise overcomers?
Why was this to be?

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