Corinth occupies the narrow isthmus that joins the Peloponnese to mainland Greece, controlling the overland route between Athens and Sparta and the two-port crossing between the Aegean and the Adriatic. Lucius Mummius destroyed the classical Greek city in 146 BC; Julius Caesar refounded it as a Roman colonia in 44 BC, and Augustus made it the seat of the senatorial province of Achaia. By Paul's arrival around AD 50 it was a young, polyglot Roman city of freedmen, merchants, and imperial functionaries. The American School of Classical Studies at Athens has excavated the forum, agora, theater, and surrounding civic structures continuously since 1896 — the longest-running American excavation in Greece. Two finds anchor the New Testament record. The first is the Bema — the raised stone tribunal at the south end of the Roman forum where the proconsul rendered judgment. Acts 18:12–17 records that "when Gallio was proconsul of Achaia, the Jews made a united attack on Paul and brought him before the tribunal." Gallio's proconsulship is independently fixed by the Delphi Inscription of Claudius to AD 51–52, providing one of the firmest absolute dates in Pauline chronology. The Bema is excavated, identified, and visible to visitors. The second is the Erastus Inscription, recovered in 1929 from a re-laid pavement near the theater: a large limestone block lettered ERASTVS PRO AED S P STRAVIT — "Erastus, in return for his aedileship, laid the pavement at his own expense." Romans 16:23, written from Corinth, sends greetings from "Erastus the city treasurer." The identification of the inscription's Erastus with Paul's is widely accepted though not universally — Steven Friesen and others have flagged the timing and the Latin office gap as genuine difficulties. The case is strong but not closed. The site is a Greek state archaeological park; the inscription remains in situ where it was recovered. Sources: Jerome Murphy-O'Connor, St. Paul's Corinth: Texts and Archaeology, third edition (Liturgical Press, 2002); Bruce W. Winter, After Paul Left Corinth (Eerdmans, 2001); Cynthia Long Westfall, Paul and Gender (Baker Academic, 2016); American School of Classical Studies, Corinth excavation series (1929–present); Acts 18:1–18.
Corinth yields two material anchors for Pauline chronology and social history: the excavated Bema tribunal, whose identification with Acts 18 is confirmed by the Delphi Inscription dating Gallio's proconsulship to AD 51–52, and the Erastus pavement inscription, which potentially names a civic official known from Romans 16:23.