By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Is mere assent to divine truth sufficient?
Upon what basis is justification granted?
How complete a Saviour is He?
After creating man, what did God say?
When was this time of reformation?
15. What commands obeyed would bring about a peaceful solution to this wide-spread and growing conflict?
Why was Christ declared worthy to open these seals?

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