By what authority was Sunday Sabbath-keeping instituted?

Answer

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

In what condition are all before they are quickened with Christ?
Through what instrumentality is conversion wrought?
What did Christ say of those who will to do God's will?
According to the New Testament, what day immediately precedes the first day of the week?
In what words will their triumph over death and the grave be expressed?
Did angels exist before the death of any of the human family?
To what place were the angels that sinned cast?

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