By what authority was Sunday Sabbath-keeping instituted?

Answer

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

How many lawgivers are there?
Before coming to Sinai, what had Moses taught Israel?
What was the Lord's covenant which they were to keep as their part of this covenant?
What has always been the result of religious legislation or a union of church a state ?
6. Under the theocracy of Israel, what was the law concerning witches' and those who had familiar spirits?
What relation do all sustain to God?
When asked if He was a king, what did Christ say?

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