The interpretation timeline
Acts 16:12 Douay-Rheims

And from thence to Philippi, which is the chief city of part of Macedonia, a colony. And we were in this city some days conferring together.

A.D. 407 – 1871 5 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"Therefore loosing from Troas, we came with a straight course to Samothracia, and the next day to Neapolis; and from thence to Philippi, which is the chief city of that part of Macedonia, and a colony." That is, even the voyage made this manifest: for there was no tardiness. It became the very root of Macedonia. It is a high distinction for a city, the being a colony. "And in this city we were tarrying certain days."”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And from thence to Philippi,.... This place is by Appianus called Datos, which was its original name; and by Diodorus Siculus, Crenidae (c), from the fountains of water, which were many and wholesome, that were about it; and it had its name Philippi, from Philip king of Macedon, father of Alexander the great, who rebuilt it (d): it is now vulgarly called Chrixopolis, that is, Chrysopolis, from the veins and mines of gold found about it; it was famous for a battle here fought between Augustus Caesar and Anthony on the one side, and Brutus and Cassius on the other, in which the latter were vanquished: which is the chief city of that part of Macedonia; which is called Edonis, in which Ptolomy places it; and a colony: that is, of the Romans; see Act 16:37 and which Pliny (e) also calls a colony: and we were in that city abiding many days; without doing anything, having no opportunity, or door opened to them to preach the Gospel; which must be a great trial of their faith, after Paul had seen such a vision, by which they were so strongly assured it was the will of God they should come and preach the Gospel here, and after they had travelled so far by sea and land; though some observe, that the word used signifies not only to abide, but to exercise themselves, by teaching and preaching the word, which it is supposed they did with success; and that the women they after met with by the river side, were such, at least some of them, who had been converted under their ministry; but the former seems to be the truest sense. (c) Ptolom. Geograph. l. 3. c. 13. (d) Pausaniae Eliac. 2. l. 6. p. 352. Plin. Nat. Hist. l. 4. c. 11. (e) Ib.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“And from thence to Philippi - This was a town of Macedonia, in the territory of the Edones, on the confines of Thrace, situated on the side of a steep eminence. It took its name from Philip II., king of Macedon. It is famous for two battles, fought between the imperial army, commanded by Octavianus, afterwards Augustus, and Mark Antony, and the republican army, commanded by Brutus and Cassius, in which these were successful; and a second, between Octavianus and Antony on the one part, and Brutus on the other. In this battle the republican troops were cut to pieces, after which Brutus killed himself. It was to the Church in this city that St. Paul wrote the epistle that still goes under their name. This place is still in being, though much decayed, and is the see of an archbishop. The chief city of that part of Macedonia - This passage has greatly puzzled both critics and commentators. It is well known that, when Paulus Aemilius had conquered Macedonia, he divided it into four parts, μερη, and that he called the country that lay between the rivers Strymon and Nessus, the first part, and made Amphipolis its chief city, or metropolis; Philippi, therefore, was not its chief city. But Bishop Pearce has, with great show of reason, argued that, though Amphipolis was made the chief city of it by Paulus Aemilius, yet Philippi might have been the chief city in the days of St. Paul, which was two hundred and twenty years after the division by P. Aemilius. Besides, as it was at this place that Augustus gained that victory which put him in possession of the whole Roman empire, might not he have given to it that dignity which was before enjoyed by Amphipolis? This is the most rational way of solving this difficulty; and therefore I shall not trouble the reader with the different modes that have been proposed to alter and amend the Greek text. And a colony - That is, a colony of Rome; for it appears that a colony was planted here by Julius Caesar, and afterwards enlarged by Augustus; the people, therefore, were considered as freemen of Rome, and, from this, call themselves Romans, Act 16:21. The Jewish definition of קלניא kolonia (for they have the Latin word in Hebrew letters, as St. Luke has it. here, κολωνια, in Greek letters) is, a free city, which does not pay tribute.”
Source
1871
A.D.
1871
“Philippi . . . the chief--rather, perhaps, "the first" city of that part of Macedonia--The meaning appears to be--the first city one comes to, proceeding from Neapolis. The sense given in our version hardly consists with fact. a colony--that is, possessing all the privileges of Roman citizenship, and, as such, both exempted from scourging and (in ordinary cases) from arrest, and entitled to appeal from the local magistrate to the emperor. Though the Pisidian Antioch and Troas were also "colonies," the fact is mentioned in this history of Philippi only on account of the frequent references to Roman privileges and duties in the sequel of the chapter. AT PHILIPPI, LYDIA IS GAINED AND WITH HER HOUSEHOLD BAPTIZED--AN EVIL SPIRIT IS EXPELLED, PAUL AND SILAS ARE SCOURGED, IMPRISONED, AND MANACLED, BUT MIRACULOUSLY SET FREE, AND THE JAILER WITH ALL HIS HOUSEHOLD CONVERTED AND BAPTIZED. (Act 16:12-34) we were in that city abiding certain days--waiting till the sabbath came round: their whole stay must have extended to some weeks. As their rule was to begin with the Jews and proselytes, they did nothing till the time when they knew that they would convene for worship.”
Source

Undated

date unknown
date
unknown
Glossa Ordinaria Medieval
“Certain, conferring. In certain books is found: Conferring the word of the Lord on the sabbath day.”
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.