Polycarp is a celebrated figure in the history of Christianity. A direct pupil of the apostle John, Polycarp lived between 70 and 155 A.D., connecting him to both the biblical apostles and the age of the early church fathers. Several ancient sources document the contributions of Polycarp to Christianity, including his letters written to the church at Philippi, in which he encourages the members to remain strong in their faith and to flee from materialism. He also instructs the members in the proper handling of financial dishonesty that was creeping into the church. Polycarp served as the bishop of the church at Smyrna (modern day Izmir in Turkey), and was recognized as one of the early combatants of Christian heresies. He rejected the teachings of Marcion, an influential heretic who tried to create a "new brand" of Christianity by redefining God and rejecting Old Testament teachings. In his well-known thesis, Polycarp combats Gnostic heresies that were beginning to spread throughout the Christian church. 
A martyr for truth
Polycarp's greatest contribution to Christianity may be his martyred death. His martyrdom stands as one of the most well documented events of antiquity. The emperors of Rome had unleashed bitter attacks against the Christians during this period, and members of the early church recorded many of the persecutions and deaths. Polycarp was arrested on the charge of being a Christian -- a member of a politically dangerous cult whose rapid growth needed to be stopped. Amidst an angry mob, the Roman proconsul took pity on such a gentle old man and urged Polycarp to proclaim, "Caesar is Lord". If only Polycarp would make this declaration and offer a small pinch of incense to Caesar's statue he would escape torture and death. To this Polycarp responded, "Eighty-six years I have served Christ, and He never did me any wrong. How can I blaspheme my King who saved me?" Steadfast in his stand for Christ, Polycarp refused to compromise his beliefs, and thus, was burned alive at the stake. 
An interesting story
Polycarp, bishop of the church of in Smyrna, at one time made a visit to Rome. Marcion and Polycarp had known each other very well back East. When Polycarp happened to come across Marcion on the street, he was going to pass without speaking. Marcion stopped him and said, "Don't you know me anymore, Polycarp?" "Yes," answered Polycarp, "I know who you are. You are the first-born of Satan." ^[ _citation\ needed_]^
A testimony for our lives
Polycarp's martyrdom is [a] historical reality. He died for one reason—his unyielding faith in the Lord, Jesus Christ. Yet Polycarp's well-recorded death is only one of many lives that were given to reveal and proclaim the truth of Jesus Christ. In light of the cruel and torturous deaths of the first and second generation Christians, all theories that Christianity is a fabricated myth, created for the personal gain of its followers, must be rejected. Even today, many will die for a belief, but none will die for a lie. God allows the deaths of His saints not because He is a helpless or indifferent Lord, but because their deaths are powerful declarations of the free gift of life that is offered to us through the Person of Jesus Christ. If you have any doubts about the truth of Christ as revealed in the Bible, reexamine the biblical text in light of the willful deaths of nearly all of its writers, men who were eyewitnesses to Christ's life and ministry. Polycarp, like many other Christians to this day, was only able to die for Christ because he lived for Christ. His life was radically transformed by the work of the Holy Spirit—the desires, worries, pains and fears of this world no longer bound him. Polycarp's life and death provides an inspirational example for all Christians. He gave his earthly life for Christ, and in the midst of his sacrifice, he gained eternal life. 
Surviving Writing and Early Accounts
His sole surviving work is his Letter to the Philippians, a mosaic of references to the New Testament. It, and an account of The Martyrdom of Polycarp that takes the form of a circular letter from the church of Smyrna to the churches of Pontus, form part of the collection of writings Roman Catholics term "The Apostolic Fathers" to emphasize their particular closeness to the apostles in Church traditions.
Irenaeus relates how and when he became a Christian and in his letter to Florinus stated that he saw and heard him personally in lower Asia; in particular he heard the account of Polycarp's intercourse with John the Apostle and with others who had seen Jesus. Irenaeus also reports that Polycarp was converted to Christianity by apostles, was consecrated a bishop, and communicated with many who had seen Jesus. He repeatedly emphasizes the very old age of Polycarp. The Martyrdom has Polycarp himself giving his age on the day of his death as 86 years.
Span of Life
The date of Polycarp's death is disputed. Eusebius dates it to the reign of Marcus Aurelius, circa 166-167. However, a post-Eusebian addition to the Martyrdom of Polycarp dates his death to Saturday, February 23 in the proconsulship of Statius Quadratus—which works out to be 155 or 156. These earlier dates better fit the tradition of his association with Ignatius and John the Evangelist.