By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What is promised to him who wills to do God's will?
What special message was given to Jonah for Nineveh?
In what age of the world is disobedience to parents to be especially manifest?
Who will thus he judged by the saints?
At His ascension, what assurance was given of Christs return ?
How perfect would God have us become?
To whom has God given the earth?

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