By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Through what instrumentality is conversion wrought?
Of what is Christian baptism an evidence?
By what should we test, or prove, all doctrine?
What did the prophet say His name should be called?
After Pentecost, how was the gospel preached?
What did He say should be done with every plant not planted by God?
6. Under the theocracy of Israel, what was the law concerning witches' and those who had familiar spirits?

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