By what authority was Sunday Sabbath-keeping instituted?

Answer

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

For what purpose is the mystery of the gospel made manifest?
In what prophecy did Christ recognize Daniel as a prophet?
What effect did this dream have upon Daniel?
What was the Lord's covenant which they were to keep as their part of this covenant?
What does the Bible present as the object of signing or sealing a document?
18. What does the prophet say the two -horned -beast power will attempt to enforce upon all the people?
Who is responsible for the present state Sunday laws of the United States?

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