Troas in the New Testament
Traos was a city of Mysia, S. of ancient Troy, opposite the island Tenedos. The country was called the Troad. Antigonus built and Lysimachus enlarged. Troas. It was the chief port between Macedonia and Asia Minor.
The roads to the interior were good. Suetonius says Julius Caesar designed to establish there the seat of his empire (Caesar, 79); Augustus and Constantine meditated the same project. Roman sentiment attracted them to Troas, the alleged seat from whence Aeueas, the fabled progenitor of Rome's founder, originally migrated. The rains are large, and the harbour still traceable, a basin 400 ft. by 200 ft.
Here on his second missionary tour Paul saw the vision of the man of Macedon praying, "come over and help us" (Acts 16:8-12). During his next missionary tour Paul rested a while in his northward journey from Ephesus, hoping to meet Titus (2 Cor. 2:12,13).
On his return from this his first gospel preaching in Europe, he met at Troas those who went before him front Philippi; he stayed at T. seven days, and here restored to life Eutychus who had fallen from the third loft, being overwhelmed with sleep during Paul's long sermon: a reproof of carelessness and drowsiness in church on the one hand, and of long and late preaching on the other (Acts 20:5-13).
Here after his first imprisonment he left his cloak, books, and parchments in Carpus' house (2 Tim. 4:13). Troas had then the jus Italicum. Beautiful coins of Troas are extant, the oldest bearing the head of Apollo Sminthius. The walls enclose a rectangle, one mile from E. to W. and one mile from N. to S.
International Standard Bible Encyclopedia, which is in the public domain (with minor edits).