As Christians generally know absolutely nothing about the evidence for the observance of the Lord's Day immediately after the time of the Apostles, Adventists easily confuse them with their strong assertions. This book reports the clear and decisive testimony of the early Christian Fathers proving that Sunday was observed by all Christians immediately following the close of the New Testament. Their exact words are given with references to where found. All the important ones during the second, third, and fourth century are quoted. These strongly refute the claim of Adventists that Sunday observance originated with the Pagan Romans centuries after Christ.