Which of these areas did Paul refer to when he wrote his letter to the churches of Galatia (Gal. 1:2)? In the New Testament the term "Galatia" is used seven times. In Galatians 1:2 and in 3:1 the people of the churches are addressed, but no hint is given of their location except that they were converted under Paul's ministry. In I Corinthians 16:1 Paul speaks of "the churches of Galatia" when he had asked for contributions for the poor in Jerusalem. In the same passage Paul refers to Macedonia (16:5), to Achaia (16:15), and to Asia (16:19). Since these last three names are references to Roman provinces, it would seem probable that Galatia in this context refers also to a Roman province, the whole territory. The two other passages that refer to Galatia are found in Acts. The first of the two, Acts 16:6, says, "And they went through the region of Phrygia and Galatia,,," This peculiar expression could be translated "the Phrygian and Galatian region" or "the Phrygio-Galatia region". Since Paul and company were traveling westward, the territory must have been adjacent to Asia and Mysia, which they were prevented by Holy Spirit from entering. The second of the two passages, Acts 18:23, says, "the regions of Galatia and Phrygia, in order." Here the same names are used, but in reverse order. This passage refers to the beginning of Paul's third missionary journey which started from Antioch of Syria and finally reached Ephesus in the province of Asia. This passage gives the order or sequence of regions that Paul went through to reach Ephesus. The first passage in Acts 16:6 gives the region that Paul went through on his second missionary journey. The problem is this: was the letter written to the churches in the south of the province founded on the first missionary journey or to the churches in Ethnic Galatia that was founded on the second missionary journey?
The South Galatian Theory gives a better explanation of the writing of the letter. If Galatians was not written until after Paul toured the ethnic Galatia territory on his second or third missionary journey, and consequently long after the Council of Jerusalem (Act 15) in A.D. 50, it is difficult to explain why Paul made no appeal to the decision of that council in settling the controversy about law versus grace. The decision of that council would have been quite useful in convincing the Galatians that the teaching of the Judaizing legalistic faction was not supported by the leaders of the church. But the fact that no action of the council is at all mentioned in this letter indicates that the council had not yet occurred when the letter was written.
This conclusion is strengthened by other considerations. The Galatians were acquainted with Barnabas (Gal. 2:1, 9, 13), who was Paul's companion only on his first journey (Acts 13, 14). The fact that the main Roman roads ran through the cities of South Galatia, and that the Judaizers were in that area, where there were very few Jews in the cities of North Galatia (according to Ramsay), point toward the destination of this letter to be the churches of Antioch, Iconium, Lystra and Derbe.
If this be the correct conclusion concerning the destination of the letter, then much that is known from the book of Acts concerning Paul's work in founding and establishing the churches there may be reflected in the letter. His address in the synagogue at Antioch of Pisidia concludes on a note that epitomizes the message of Galatian letter (Acts 13:38-39). Also the welcome that Paul received in Lystra (Acts 14:11ff.) may well be referred to in the letter (Gal. 4:14). Luke in Acts 15:1-5 records Paul's return to this territory on his second missionary journey when he added young Timothy to his missionary team. If the letter had been written later, then why was Timothy not mentioned in the letter to the Galatians?
[1] J. B. Lightfoot, St. Paul's Epistle to the Galatians
(Tenth Edition; London: Macmillan & Co., 1890), pp. 18-35.
[2] William M. Ramsay, A Historical Commentary on St. Paul's Epistle
to the Galatians
(New York: G. P. Putnam's Sons, 1900), pp. xi, 478.