This book provides a new view on Luke's Gospel by introducing it as the source of the New Testament. A close reading of the works of Flavius Josephus and Latin inscriptions confirms the validity of the chronological landmarks delivered by the Evangelist. Together these three sources form a cohesive whole like a puzzle with finely-tuned pieces. The Codex Bezae Cantabrigiensis, which preserves the oldest known text of the Gospels and Acts written in Greek, attests that the Evangelist fulfilled the purpose of veracity advertised in the preface. The reliability of his work is linked to its early publication, in the decade following the events so that even Mark and Paul had knowledge of it. From this point of view, the "Lukan priority" that preserves the historical truth about Jesus' life, would no longer be just an assumption. In this context, the conditions under which the Third Gospel was written are revealed, and with them, the objectives pursued by those who assumed responsibility for it, and who can be identified. Let us hope these pages will encourage other biblical Scholars to investigate the Third Gospel and Acts from the perspective of the "Lukan priority".