By what authority was Sunday Sabbath-keeping instituted?

Answer

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

What is Christ's relation to this faith?
11. How is the closing work of the gospel under the outpouring of the Spirit described by the Revelator?
What challenge is made by those who worship the beast?
What example did Christ set in Sabbath observance?
Will the world be prepared to meet Him?
How does Paul speak of this coming?
What was the color of the symbol under the third seal?

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