The Philadelphia St. Jean Church, located in the Alaşehir district of Manisa, has an important place in the history of Christianity as one of the seven churches mentioned in the Revelation section of the Bible and to which messages were sent. Built in the 6th century AD, this basilica was built in the name of Ioannes (John), one of the Apostles. Today, only three monumental pillars remain from the church, and these ruins are located in the Beşeylül Neighborhood in the Alaşehir district center. It is known that the structure originally had six supporting pillars. The ancient city of Philadelphia was founded by King Attalos II Philadelphos of Pergamon and was known as "Little Athens" during the Roman period for its temples and festivals. The city, which maintained its importance during the Byzantine period, was surrounded by sturdy walls.