Answer:The Apostolic Fathers were core Christian theologians among the Church Fathers who lived in the 1st and 2nd centuries AD, who are believed to have personally known some of the Twelve Apostles, or to have been significantly influenced by them.[1] Their writings, though popular in Early Christianity, were not included in the canon of the New Testament. Many of the writings derive from the same time period and geographical location as other works of early Christian literature which came to be part of the New Testament. Some of the writings found among the Apostolic Fathers appear to have been highly regarded as some of the writings which became the New Testament