By what authority was Sunday Sabbath-keeping instituted?

Answer

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

How did He encourage His disciples to look for the fulfilment of prophecy?
What reason did Solomon give for urging all to fear God and keep His commandments?
21. What shows that the new, or second, covenant and the Abrahamic covenant are virtually the same?
Under what authority were its decrees published?
What plain proposition did he submit to all Israel?
Whose prayers does Solomon say are an abomination?
In narrating the work of creation, what statement is made concerning its completion?

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