How this was decided
The one date everything hangs on
Pauline chronology is a structure resting on a single external anchor, and every date on this site should be read with that in mind.
Reader question
How can anyone date events in Paul’s life when the sources give no dates?
Through one external anchor. Acts places Paul before Gallio, the Roman proconsul of Achaia, and an inscription found at Delphi dates Gallio’s term to about AD 51-52. That fixes the long stay in Corinth, and the intervals Paul gives in his own letters are reasoned outward from it in both directions.
Why one inscription matters so much
Neither Acts nor the letters date anything the way a modern document would. There are no regnal years attached to Paul’s movements, no consular dating, no calendar. What there are instead are intervals — "after three years", "after fourteen years", "eighteen months", "two whole years" — which fix events relative to each other but float freely in absolute time.
A single external fix turns that floating chain into a dated one. Gallio is that fix. Acts brings Paul before him at Corinth; a fragmentary inscription at Delphi, quoting a letter of the emperor Claudius, names Gallio as proconsul of Achaia and can be dated to roughly AD 51-52. Proconsuls served short terms, so the overlap is narrow, and the Corinthian stay lands there.
What the anchor does not fix
Everything else is reasoned outward, and the reasoning accumulates uncertainty as it goes. Dates near Corinth are relatively firm. Dates at the far ends — the conversion at one end, the post-Acts years at the other — are much softer, which is why the timeline marks them differently rather than presenting the whole span at one confidence.
The intervals themselves are also less precise than they look. Ancient inclusive counting can treat parts of years as whole ones, so a stated fourteen may behave like twelve or thirteen. Travel moved with the sailing season rather than the calendar, and Acts sometimes compresses. Every date here is therefore a range, and marked approximate.
Reading a dated timeline honestly
The practical consequence is that a reader should treat the sequence as much better attested than the years. That Paul was in Corinth for eighteen months before Gallio, then sailed, then spent years at Ephesus, is well supported. That this happened in AD 50-52 specifically depends on one inscription and a chain of inference.
A second consequence is that the anchor constrains the letters as well as the events. If the Corinthian stay is fixed, then the letters written from Corinth and the letters written to Corinth acquire approximate dates through it, and the sequence of the Corinthian correspondence — including a painful visit and a letter that has not survived — has to fit inside that window. The dating of the letters is not independent evidence; it leans on the same stone. It is worth knowing how thin the anchor physically is. The Delphi text survives in fragments, reassembled from several pieces, and it is a letter of Claudius rather than a record about Gallio as such — he appears in it incidentally, as the serving proconsul. The dating turns on Claudius’ imperial acclamations, which can be placed within a known window. It is a good anchor, and it is one damaged stone.
Each row of the chronology carries a confidence label for exactly this reason, and the label describes the placement rather than the event. A high-confidence row means the order is secure, not that the episode is beyond dispute.
Common questions
What is the Gallio inscription?
Fragments of a letter from the emperor Claudius, found at Delphi, that name Gallio as proconsul of Achaia. Claudius’ titles in the letter date it closely, and proconsuls served short fixed terms — so Gallio’s year in office can be placed at about AD 51-52, and Acts puts Paul in Corinth in front of him.
Does the inscription mention Paul?
No. It dates Gallio’s term and nothing more; the hearing itself rests on Acts’ testimony alone. What the stone establishes independently is the setting — the right man, in the right office, in the right years — and the chronology of Acts fits inside it. The fit is evidence about the narrative’s frame, not proof of the scene.
Are there other fixed points in Paul’s chronology?
A few, all softer: the accession of Festus late in the 50s, which is itself debated; Aretas’ authority over Damascus, which ended by AD 40; the famine under Claudius. Each constrains the timeline without pinning it, which is why one sharp inscription carries as much weight as it does.
Bibliography and sources
- The project’s 67-row chronology, cross-referencing Acts and the letters and labeling debated dates.
- Acts 7–28, World English Bible (public domain). View source
- Raymond E. Brown, An Introduction to the New Testament (Doubleday, 1997).