By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What great exchange has been wrought for us in Christ?
Because some thought He had come to destroy the law, what did Christ say?
What, therefore, did God say He would make?
What day does the commandment say is the Lord's?
1. According to the words of the angel to Daniel, when might the world look for an increase of knowledge?
Why did Christ, in the parable, reprove the man who hid his talent?
What promise, through the prophet Malachi, does the Lord make concerning Elijah?

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