Ancient Philadelphia, modern Alaşehir, is a town located in Manisa Province in the Aegean region of Turkey. It was built in 189 BC by King Eumenes II of Pergamon. The remains of the 600 AD Byzantine basilica of St. John are considered to be the main archaeological attraction in the modern city. In early Christian times, Philadelphia was home to a significant Christian church, mentioned as one of the seven Churches of the Book of Revelation.