In the movie Biblical Prophecy of John, the narrator says of a local church of Laodecea described in John's Revelation and located in what is now in modern Turkey:
It's interesting to see from archeology what a large role some of the mid 1st century Christians had in their local societies.One of the members was Philemon. ... Philemon was a wealthy landowner in this area who owned many slaves. One of them was Onesimus whose name means useless, ran away. Paul met him, converted him to the faith and sent him back to his master Philemon. Recently archeologists here in Laodicea found a plaque to a Marcus Cestus Philemon for his benefactions to the city.. I wonder if their Philemon was our Philemon to whom Paul wrote in the New Testament?