On June 22, the Holy Office formally condemns Galileo for heresy:
“We say, pronounce, sentence and declare that you, the said Galileo...have rendered yourself in the judgment of this Holy office vehemently suspected of heresy, namely, of having believed and held the doctrine which is false and contrary to the Sacred and Divine Scriptures, that the sun is the center of the world and does not move from east to west and that the earth moves and is not the center of the world...after it has been declared and defined as contrary to Holy Scripture...From which we are content that you be absolved, provided that...you abjure, curse, and detest before us the aforesaid errors and heresies and every other error and heresy contrary to the Catholic and Apostolic Roman Church.” Pope Urban VIII took full responsibility for the condemnation of Galileo by enforcing “in forma communi” the Congregation’s prohibitions against books holding the Copernican system as truth.
Reference: Exorciser le spectre de Galilée - Abbe Philippe Marcille, Editions du Sel, 2014, pp 40 and scripturecatholic.com
St. John Chrysostom Commentary on the Hebrews 8:1
“Where are those who say that the heaven is in motion? Where are those who think it is spherical? For both these opinions are here swept away.”
Quoted by Cosmas.
St. Jerome, Commentary on Isaiah
God "[had] established the great mass of the land and had gathered it together above the seas and rivers, so that the heaviest element [earth] hangs over the lighter weight waters by the will of God, who like a king sits above the circle of the earth. There are some who assert that this mass is like a point and globe...What, then, will the land be over ...?"
Original latin here
From the Pontifical Decrees Against The Doctrine The Earth’s Movement by Rev. William W. Roberts
"Since it has come to the knowledge of the above-named Holy Congregation that the false Pythagorean doctrine, [See: Pythagoras] altogether opposed to the divine Scripture, on the mobility of the earth and the immobility of the sun...this Congregation has decreed that the said books...be suspended till they are corrected; but that the book of Father Paul Antony Foscarini the Carmelite be altogether prohibited and condemned, and all other books that teach the same thing; as the present decree respectively prohibits, condemns, and suspends all...." (pp.56, 57)
[Why is this significant? The idea that the world was a sphere has been around a long time, but Pythagoras was one of the first to come up with it. This quote shows that the church was not only aware of the round earth error but also that its source was pythagoras]
“Resuming then, let us first lay bare, in speaking of those things according to our power, the imposture of those who boast as though they alone had comprehended from what forms the heaven is arranged, in accordance with the hypothesis of the Chaldeans and Egyptians. For *they* say that the circumference of the world is likened to the turnings of a well‐rounded globe, the earth having a central point. For its outline being spherical, it is necessary, they say, since there are the same distances of the parts, that the earth should be the center of the universe, around which as being older, the heaven is whirling. For if a circumference is described from the central point, which seems to be a circle, ‐ for it is impossible for a circle to be described without a point, and it is impossible for a circle to be without a point, ‐ surely the earth consisted before all, they say, in a state of chaos and disorganization. Now certainly the wretched ones were overwhelmed in the chaos of error, “because that, when they knew God, they glorified Him not as God,