By what authority was Sunday Sabbath-keeping instituted?

Answer

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

For whom did Christ suffer all these things?
What is the character of a child who will not listen to his father's instruction?
What will He then do for each one?
What were the names of these seven churches?
What name is given to the third state of the church?
How was Peter delivered later?
What did the Ephesians do upon hearing the gospel?

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