By what authority was Sunday Sabbath-keeping instituted?

Answer

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

18. When asked by the rich young man the conditions of eternal life, to what did Jesus direct his attention?
Wherever Abraham went, what was his practice?
Why were the Sacred Writings given?
7. What did He say of the wars, famines, pestilences, and earthquakes which were to precede these events?
What will the Lord he to His people at this time?
21. What scripture shows that Satan is to work with special power and deceptive wonders just before Christ's second coming?
To what Old Testament promise did Peter evidently refer?

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