By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Into what condition has sin brought the entire creation?
If one professes to abide in Christ, how ought he to walk?
To whom has execution of judgment been committed?
What will be the experience of those who say in their hearts that the Lord is not soon coming?
What is to be finished when the seventh trumpet is about to sound?
What description is given of Gabriel in Daniel?
19. When this city becomes the metropolis of the new earth, what will be the condition of God's people?

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