Genesis 6:16

(Verse 16.) Assembling, you shall make an ark, and you shall finish it with a cubit from above. As for the reason why it says, assembling, you shall make an ark, in Hebrew it has, 'you shall make the middle of the ark,' which Symmachus interpreted more clearly, saying 'transparent,' that is, making the ark clear, intending for a window to be understood.

WHAT DOES THE SCRIPTURE MEAN ABOUT THE CONSTRUCTION OF THE ARK: AND THE DOOR OF THE ARK YOU SHALL MAKE ON THE SIDE; WITH LOWER, SECOND, AND THIRD STORIES SHALL YOU MAKE IT? — The lower floor was not to receive two and three rooms. Using this distinction, God wanted to make it clear that the entire Ark had to have a lower part. Then, above, a floor, which he calls a second rooms; Higher up finally, another floor, or a third vault. So in the first dwelling, I mean, in the lower part, the Ark had a first vault; In the second dwelling, which was above the first, it was also vaulted; So was she again and a third time in the third dwelling, which rose above the second. [

You shall make upper rooms and lower rooms in it. Lower rooms denote a triple roof. For "stege" in Greek means "roof"; hence ancient interpreters for this word used "tricamerata." Finally, in the Acts of the Apostles, where a young man, whom Paul the Apostle revived from death, is said to have fallen from the third roof or upper room, in Greek it is written that he fell from the "tristego." But upper rooms and lower rooms, as early translators said, were made two-chambered and three-chambered in the ark, such that in distinct seats they would house animals of various kinds. Beasts, indeed, as it is believable, in the lowest parts; clean animals in the higher parts; humans and birds in the highest. For it is certain that where man sat, there too were the raven and dove, and consequently other birds too, located near the window, which is believed to have been made in the highest parts of the ark. For through this window he sent out the aforementioned birds, to see how the land's face fared; in these roofs as well, various little chambers were made, as stated above, for the distinction of the same animals or birds, so that some might not harm others, the more violent not harming the gentler. It is not in vain that Scripture states upper rooms and lower rooms were made in the ark, or that it was made two-chambered and three-chambered, when it could have said in one word that it was arranged in five upper rooms or roofs; but it said it was two-chambered, to signify that in the Church the circumcised and the uncircumcised, Jews and Greeks, will be saved. And three-chambered to signify the triple yield of the evangelical seed, thirtyfold, sixtyfold, hundredfold; so that in the lowest resides marital chastity, above it widowhood, and above that virginity. Moreover, Origen says that in the lower parts the ark was made two-chambered, so that the lowest region would receive dung, the second would be assigned to storing feed; but in the higher parts three-chambered, so that in the first of these parts would be quarters for beasts, in the second stalls for gentler animals, in the highest the seat for humans.