According to Genesis, what was the Ark’s only door made in?

According to Genesis, the Ark had one door made in its side.

Genesis 6:16 gives the construction instructions for the Ark and says that its opening, or window, was to be made above, while the door was placed in the side. The verse also describes three decks. Together, these details make the side entrance one of the few specific features of the vessel’s design.

The biblical text does not identify the door as front, rear, or stern; it simply places it in the side. It also does not describe hinges, locks, or the door’s dimensions. Later artwork and films often add those details, but they are artistic reconstructions rather than information supplied by Genesis.

The Ark’s side door should not be confused with the window or opening mentioned in the same verse. Genesis 8 later describes Noah opening the Ark’s window to send out birds, suggesting that the opening had a separate function from the entrance.