By what authority was Sunday Sabbath-keeping instituted?

Answer

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

For how long does marriage bind the contracting parties?
How is sin defined?
Was there anything made without Christ?
What pitiful appeal did He make to the impenitent city?
What were the colour and character of the fourth symbol?
How was Peter delivered later?
What encouragement is held out concerning the branches which have been broken off?

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