From the early Church Fathers to now.
“And the great city was divided into three parts; and the cities of the Gentiles fell. And great Babylon came in remembrance before God, to give her the cup of the wine of the indignation of his wrath.”
“This great city is to be understood as in general every people that is under heaven and that is seen to be in three parts when the church is divided [into three parts]. And so, the Gentiles are considered to be one part, the heretics and false Christians [are] another part, and the catholic church [is] the third part.”
“The city that was great because of the size of its population and that was haughty and arrogant because of its immodest enterprises shall fall into three parts. One part will be of the Gentiles, another of the heretics and the Jews, and the third part which is of the false brothers is rejected, for they "confess to know God, but they deny him by their deeds; they are detestable, disobedient, unfit for any good deed." The passage continues, "The cities of the nations fell," that is, all the strength and confidence of the nations fell. "And that great Babylon was remembered and came under the sight of God." This indicates that the multitude of all of the damned were confused. "And he gave to her from the wine of the fury of his wrath." It describes the wicked receiving the retribution of that revenge that they merited.”
“We understand Jerusalem to be a "great city" not because of the number and size of its buildings but as that which is the most ancient and greatest in regard to godliness, in as much as it was made great by the sufferings of Christ and is to be distinguished from the cities of the nations. We think that the division of this city into three parts suggests the division between the Christians and the Jews and the Samaritans who live in it. Or the division is of those who are steadfast in faith and those who have defiled their baptism with filthy works and the Jews who have in no way received the proclamation.… For at the present time the Jews and Samaritans hide their real intentions out of fear of our pious rulers, and they seem to be associated with us, not daring to separate themselves with their own people. It is similar to the fact that those who are truly Christians are intermingled with those who possess the name [of Christian] alone. But when the cleansing fire of temptations will unmask them, then there will occur the division of these people into the three groups of the impious, the pious and the sinners, and these will gather together with those of like habits and be associated with their own kind. The falling of the cities of the nations indicates either their destruction or the cessation of the pagan manner of life at the coming of the kingdom of God, which, according to Daniel, the saints will possess. "And God remembered great Babylon, to make her drain the cup of the wine of the fury of his wrath." The thronging multitude, confounded by the meaningless distractions of life and made great by the wealth of their injustices, will drink the cup of the wrath of God. It is as though they went from a merciful forgetfulness [of God] to a remembrance and now faced the retribution for their trampling of the righteous One and for the impiety of their words and deeds.”
“And the great city was divided into three parts. The impious city inflicts a threefold war upon the Church of Christ. Which the Gentiles and Jews openly with combat, heretics with deceitful defection, false brethren with corrupt examples assail. Which was also figured above in the three bad horses, the red, black, and pale.”
“And the cities of the nations fell. That is, all the strength and confidence of the nations. For the joy of the wicked is a great ruin, and the joy of the unrighteous is destruction.”
“And great Babylon came into remembrance before God, etc. Then Babylon falls, or drinks the wrath of God, when it receives power against Jerusalem, especially in the final days. Therefore he said that it fell by the earthquake that affects the Church. But if you refer this to the day of judgment, then the impious will come into remembrance before God, who now says in his heart: God has forgotten.”
“And he says the great city was divided into three parts, and the cities of the nations fell. Concerning Jerusalem he says the great city, and it is clear from what he contrasts with it the cities of the nations; for in the divine Scripture, it is customary to call Israel, apart from the other peoples, a nation. And he calls it great, as infamous. And all the cities fell; for when the land was being transformed and made new, how could the cities standing in it remain untouched, defiled by the dwelling of sinners? And Babylon, he says, the Great, was remembered before God to be given the cup of the wine of the fury of his wrath. In what it said previously, And another angel followed, saying, "Babylon the great has fallen;" (Rev. 14:8) but in the present passage he wants us to understand that he does not mean that Babylon, but signifies another. And I think he means Rome and those who will then occupy it, as the discourse to follow will teach. Therefore he says that great Babylon was remembered before God. That is, the memory of her former sins, when they persecuted and killed the saints, came before God; and the cup of the wine of the wrath of God is already interpreted; therefore there is no need to speak at length.”
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.