Saint Polycarp was a student of Apostle Yuhanna and also one amongst the fathers of churches that were raised in Anatolia. The Investigating of Saint Polycarp's Christianity approach and his impact on Christian theology constitute the subject of this study. Seven churches, which are mentioned in the Revelation book of Yuhanna Bible, are located in Anatolia which is also named as small Asia, being within borders of the Aegean Region. One of these seven churches is the Izmir (Symrna) church and it bears important because not only it has reached our time but also it is the only church, amongst these churches, which has been attributed to Saint Polycarp and which is open for worship. During his life, Polycarp has made many efforts to live and bring to life Christianity, he became a role model for his surroundings by his altruism and his loyalty to the apostle tradition and he was called the "leader of Asia", "father of Christians". The church of Saint Polycarp, the most ancient church in Izmir which is still open in our time, is like a piece of evidence showing how much Saint Polycarp is loved and respected.