By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What are the commandments of God declared to be?
What reason did they give for not receiving Him?
How had they done this?
After the crucifixion, what day was kept by the women who followed Jesus?
5. What will be the dragon's attitude toward the remnant people who keep the commandments of God?
How, according to Luke, did Christ answer this question?
What is the measurement of the city?

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