Addressed to a certain Theophilus, about whom nothing is known (1:1), the Book of Acts records the early history of the Apostolic Church. Beginning with the Ascension of Jesus to heaven, it traces the growth of Christianity in Palestine and its spread to Syria, Asia Minor, Greece, and eventually to Rome. The leading figure in the first chapters is Peter, who delivered the stirring sermon on the day of Pentecost (2). The greater part of the book, however, is devoted to the experiences of Paul and his companions during their missionary endeavors. The Book of Acts provides a useful background for study of the Pauline Epistles. The introduction (1:1) attests to a Lukan authorship.