By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Who appeared to accuse Christ before Herod?
By what other title is the Comforter designated?
To whom does vengeance belong?
What is the first which He took away?
How may grace and peace be multiplied in believers?
Where are the righteous to be recompensed?
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