While some critics have claimed the Bible’s Gospel accounts weren’t written for more than a century after Jesus’ death; internal proofs, such as Matthew’s use of the city name Caesarea Philippi, show that this book had to be written prior to the middle of the First Century CE. For that city (which is near the border of Lebanon) was only called Caesarea Philippi during the brief reign of the Herods. Rather, the common name both before and after the Herods was ‘Panas,’ after the Roman God Pan, whose idol was located there.
So, since this fact would have been lost to history just a few years after the Herods, it proves that the Book of Matthew had to be written shortly after Jesus’ execution and before 50-CE.
This city is also mentioned three times in the Gospel of Mark, which was written after 50-CE.
But his Gospel (that was written in Greek for Greek-speaking proselytes) was clearly based on the writings of Matthew (before Matthew’s Gospel became available in Greek), thus we find the same use of the name.