By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What was one direct purpose of the incarnation of Christ?
What are children declared to be?
What tender, filial regard did Christ manifest for His mother in the hour of His death?
By what was the third universal empire symbolized?
Still bent on persecution, how does Satan manifest his enmity against the remnant church?
What sign was to follow the darkening of the sun and the moon?
What did the prophet Isaiah predict of Christ?

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