Philadelphia was founded by the Pergamene king Attalus II (159-138 BC), which is the newest of the Seven Churches’ cities. When the Romans attempted to turn Attalus against his brother Eumenes II, he remained loyal, thereby earning the nickname “Philadelphus” (Polybus 30:1-3; 31.1; 32.1). The name of the city reflects the love between these brothers. Philadephia was strategically situated along the imperial post road that ran from Rome through Troas, Pergamum, and Sardis through to Tarsus and the east. Another road running eastward was an “open door” to Phrygia (Revelation 3:8).

费城 是第六个在启示录1-3中提到的七个教会之一。Ammia和Quadratus是基督教先知,在亚德里安统治期间在费城服事。 蒙大尼主义运动,始于公元2C年底,起源于亚达巴夫的费城以东10公里。 与他的两个先知普利斯卡和马克西米拉,蒙大尼教导帕拉克莱特(圣灵)会来之前的第二次降临。