Antioch in Pisidia is an ancient city in Asia Minor in what is now Turkey. It is one of several cities founded by Seleucid rulers named Antiochus and named after them.
Since the boundaries of the Pisidia landscape were drawn differently over time, Antioch did not belong to Pisidia for a time. At the time of the New Testament it belonged to Phrygia, the Αντιόχεια τὴν Πισιδίαν used in the Acts of the Apostles (13:14) should best be rendered with "Antioch at Pisidia".
The Pisidic Antioch was laid out with settlers from magnesia on a strategically favorable place near today's Yalvaç. After the establishment of the Roman province of Galatia, the city became 25 BC. Again founded as a veterans colony with the name Colonia Caesarea Antioch. It was connected to other Augustan foundations in Asia Minor via the important military road via Sebaste. In the course of Diocletian's imperial reform, Antioch became the metropolis of the newly founded province of Pisidia.
Antioch in Pisidia quickly developed into one of the most important Roman cities in Asia Minor. As early as the 1st century AD, several senators can be found who came from Antioch.
Source: Wikipedia