According to a notice on the site this is the oldest church (from 325 AD) dedicated to St. Paul in the world. It stood on the site of a synagogue where he first preached to the gentiles.

On the picture: The east wall of the basilica, with a hexagonal wall encircling the apse
The prayer hall of the church, which has an east-west orientation, is 27 x 57 m and has three naves (one large in the middle, two narrow ones at the sides); to the west lies a narthex (entrance area), which is 27 x 13 m.
The Great Basilica (St.Paul’s Church) is known as one of the two earliest examples of Early Christian churches in Anatolia; the other example is in Daphne (near Antakya) and is dedicated to St.Babylas.

Correspondent: J.M.Criel, Antwerpen.
Sources: ‘Pisidian Antioch’ – Ünal Demirer, archaeologist. (Ankara, 1997)
& Personal visits (1994 – 2003).