In Genesis, Noah’s Ark had three levels.
Genesis 6:16 instructs Noah to make the Ark with lower, second, and third decks. The same verse mentions a window or opening and a door at the side. These details are part of the Ark’s brief biblical specification, alongside its dimensions and internal compartments.
The three-level description is distinct from later artistic reconstructions, which may add elaborate rooms, ramps, cages, or structural systems not stated in Genesis. The text gives a simple vertical arrangement rather than a complete engineering plan. It also does not identify the exact shape of the hull or explain how the decks were supported.