The postal-route geography — counterclockwise from Ephesus
The seven cities of Revelation 2–3 are listed in a specific order — Ephesus, Smyrna, Pergamos, Thyatira, Sardis, Philadelphia, Laodicea — corresponding to the Roman postal circuit that a single courier in 1st-century Asia Minor would have walked, counterclockwise, north up the coast from Ephesus, then east and south through the inland provinces. Sir William Ramsay (PD) established the postal-route reading in The Letters to the Seven Churches of Asia (1904). The order is not arbitrary; it is geographically and logistically constrained.