By what authority was Sunday Sabbath-keeping instituted?

Answer

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

With what, therefore, is the faith of Jesus joined?
What does Solomon say his father did for him as a child?
16. Could the offerings commanded by the ceremonial law satisfy or make perfect the conscience of the believer?
What do Catholics say of the observance of Sunday by Protestants?
Why were the ancient Sunday laws demanded?
How, according to Luke, did Christ answer this question?
Did this doctrine exist in ancient times?

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