The Delphi Inscription, or Gallio Inscription at Delphi (also Gallio Inscription), is the name given to the collection of nine fragments of a letter written by the Roman emperor Claudius c. 52 CE and discovered early in the 20th century at the Temple of Apollo in Delphi, Greece.
The reconstructed inscription begins thus:
- Tiber[ius Claudius Cae]sar Augustus Ge[rmanicus, invested with tribunician po]wer [for the 12th time, acclaimed Imperator for t]he 26th time, F[ather of the Fa]ther[land...]. For a l[ong time have I been not onl]y [well-disposed towards t]he ci[ty] of Delph[i, but also solicitous for its pro]sperity, and I have always guard[ed th]e cul[t of t]he [Pythian] Apol[lo. But] now [since] it is said to be desti[tu]te of [citi]zens, as [L. Jun]ius Gallio, my fri[end] an[d procon]sul, [recently reported to me, and being desirous that Delphi] should retain [inta]ct its for[mer rank, I] ord[er you (pl.) to in]vite well-born people also from [ot]her cities [to Delphi as new inhabitants....]
The reference to proconsul Gallio in the inscription provides an important marker for developing a chronology of the life of Apostle Paul by relating it to the trial of Paul in Achaea mentioned in the Acts of the Apostles (18:12-17).
- Paul: his letters and his theology by Stanley B. Marrow 1986 ISBN 0-8091-2744-X page 47 
- Christianity and the Roman Empire: background texts by Ralph Martin Novak 2001 ISBN 1-56338-347-0 pages 20-22
- Jerome Murphy-O'Connor, St. Paul's Corinth: Text and Archaeology (Liturgical Press, 2002) ISBN 9780814653036 p.161.
- A. Köstenberger, The Cradle, the Cross, and the Crown: An Introduction to the New Testament, 2009 ISBN 978-0-8054-4365-3 page 400
- The Cambridge Companion to St Paul by James D. G. Dunn (Nov 10, 2003) Cambridge Univ Press ISBN 0521786940 page 20
- Novak, Ralph Martin (2001). Christianity and the Roman Empire: Background Texts. Continuum International Publishing Group. pp. 20–22. ISBN 978-1-56338-347-2.
- Murphy-O'Connor, Jerome (2002). St. Paul's Corinth: Text and Archaeology. Liturgical Press. pp. 161–169. ISBN 978-0-8146-5303-6.
- Köstenberger, Andreas J., L. Scott Kellum and Charles Quarles (2009). The Cradle, the Cross, and the Crown: An Introduction to the New Testament. B&H Publishing Group. p. 400. ISBN 978-0-8054-4365-3.