Most of the Church Fathers believed that earth was a globe (in the sense of it being surrounded by the globular firmament) and that this globe then was suspended in the middle of the waters, then at the bottom of this globe you had the earth, and toward the top the first heaven (air/atmosphere). St. Augustine mentions that there were some who held that the earth was at the bottom of the universe, since the density of the earth would cause it to sink. We find St. Ambrose refuting that opinion, saying instead that the globe is suspended in the waters. St. Augustine, while holding the globe to be suspended in the waters, said that it would be permissible to hold that it's at the bottom because bottom center is still center. In that case, the world would be shaped more like a hemisphere. In fact, St. Augustine also refers to disputes about the shape of the earth, whether it was a sphere (suspended in the waters, with the firmament encircling the entire system) or a hemisphere (where it had settled to the bottom), and where some even held it was shaped like a cone, since some argue that the firmament was likened to a tent, and you can't have spherical tents (but he argues from the example of a leather ball, which is spherical in shape).
And, by the way, here's where Sungenis goes off the rails. Every time he sees the term "globe" in the Church Fathers, he reads into it (one of his own favorite terms, ironically, being "eisegesis") the NASA ball model, but the Patristic "globe" referred to the firmament encircling everything ... like a snow globe. Heck, there was one time Sungenis even read NASA ball into a Patristic reference to "circle". His first citation from the Fathers was St. Ambrose, but Sungenis didn't seem to realize that St. Ambrose was talking about waters striking the surface of the globe. So, waters were hitting the surface of the NASA ball? No, he clearly means the globe of the firmament, which keeps the waters from the surface of the earth. In another passage, Sungenis cites a Father who likens the earth to a globe ... with a cross-sectional circle slice. So, Sungenis, what is that cross-sectional circle slice? It's clearly the plane (flat) surface of the earth intersecting through the globe of the firmament. Otherwise it's meaningless from the NASA ball model perspective. It's ironic that Sungenis uses the DaVinci Salvator Mundi image for the cover of his book, since if you actually look at the painting, the globe Our Lord is holding shows the dark earth at the bottom with the blue atmosphere at the top, and there are STARS inside the top part. It's clearly the snow globe model. It's ironic because that is also Sungenis' chief error is misinterpreting the Church Fathers.