By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What was predicted of Christ's preaching?
13. To the woman who had been healed by touching His garment, what did Christ say made her whole?
Who does the apostle say saw Christ after He was risen?
What are some good fruits of proper child training?
By what method of reasoning did Christ justify acts of mercy on the Sabbath day?
When the sign appeared, how suddenly were they to flee?
Do the dead know anything?

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