In Genesis, Noah is commanded to put a window over the Ark’s opening.
Genesis 6:16 includes a construction instruction for an opening or window, traditionally translated in English as a window. The verse also describes the Ark as having lower, second, and third levels. Together, these details present the vessel as an enclosed, multi-level structure with a controlled source of light and ventilation.
The precise architectural meaning of the Hebrew term and its placement has been discussed by translators and commentators. English versions vary in wording, but “window” is the standard answer in traditional biblical English and in many modern translations.
The window later becomes important in Genesis 8, when Noah opens it and sends out birds to test whether the floodwaters have receded. It should not be confused with the Ark’s door, which Genesis also mentions. The opening and the door serve different narrative and structural roles.