Pisidia Antiokheia Ancient City Yalvaç, located in Isparta province, is a significant site of antiquity that stands adjacent to the ancient city which served as the capital of Pisidia. In earlier times, this region was known as Pisidia Antiokheia. The Pisidia Antiokheia archaeological site is situated around a kilometer away from Yalvaç town. Following Atatürk's request for excavation, a considerable portion of the ancient city was unearthed. The city of Antiokia was established in 39 or 36 BC, under the control of either Seleukos 1st or his son Antiokhos. When Amyntas assumed power, the city was included in the state of Galatia. Antiokheia was later transformed into a Roman colony in 25 BC or a little later, retaining its status for over two centuries. As the metropolis of Pisidia, an elevated state that gained renown for its role as a bishopric, Antiokheia prospered until it was destroyed by Arab invasions in 713 AD. Built on a high hill, the city was surrounded by an oval-shaped wall that measured 2920 meters in length. The wall thickness varied depending on the terrain slope, ranging from 1.50 meters in upslope sections to 4.75-5 meters in flatter areas. In the west of the city of Antiokheia stood the most splendid entrance gate, designed as a three-opening passage with two side pylons and two mid pylons. The legs supporting the vaults had dimensions of 3.2 x 2.36 meters and were smoothly constructed with limited molding at their bases. The pillars on both sides of the opening were adorned with plant motifs on plaster, and had 4-meter openings at the base. Following Emperor Augustus' death, the Augustus Temple was constructed at the highest point of the city's holy area. The building's base was carved from the existing rock, and the temple itself was located on a 2.5-meter-high platform accessible by 12 steps. Another surface, measuring 5.65 x 7.90 meters and two meters deep, was carved out of natural rock and likely used for storing ceremonial goods. In front of the temple stands an avenue measuring 63 x 85 meters with two rows of pillars, each 5 meters wide, still visible today. The largest church in Antiokheia, Saint Paul Church, is located approximately 200 meters south of the city walls. St. Paul gave his first sermon with Barnabas at a synagogue under this church, and the church is dedicated to him for this reason. It holds great significance in the spread of Christianity.