Myrna and even steven,
I can understand that with the amount of threads on the subject and fluff in them, it can be hard to find proof that the earth is flat.
Here are some videos to start you off.
And the Fathers of the Church:
Lactentius in the Divine institutes, Chapter 24 :
they thought that the world is round like a ball, and
they fancied that the heaven revolves in accordance with the motion of
the heavenly bodies; and thus that the stars and sun, when they have
set, by the very rapidity of the motion of the world are borne back to
the east. Therefore they both constructed brazen orbs, as though after
the figure of the world, and engraved upon them certain monstrous
images, which they said were constellations.
....I am at a loss what to say respecting those who, when they have
once erred,
consistently persevere in their folly, and defend one vain
thing by another; but that I sometimes imagine that they either discuss
philosophy for the sake of a jest, or purposely and knowingly undertake
to defend falsehoods, as if to exercise or display their talents on
false subjects.
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 IsaiahGod "[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
Methodius:“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 circuмference 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 circuмference 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,