By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What terrible judgment came in consequence of continued sin and transgression against God?
Of whom was Christ to be born?
Where and by whom were the foundations of home laid?
What power was represented by the ram having two horns?
How enduring is the moral law?
What saying will then be brought to pass?
4. And when the new heavens and the new earth have appeared, and the holy city, New Jerusalem, then he made?

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