According to Genesis, Noah made a window in the Ark. Genesis 6:16 instructs him to make an opening for the vessel and to finish the ark within a cubit of the top; many English translations render the feature as a window.
The Hebrew term in this verse is uncommon, and translations differ in how they describe the opening. Some versions use “roof,” “opening,” or a related architectural term rather than the simple word “window.” The biblical text also mentions a door in the side of the ark, so the window and entrance are separate features.
The opening becomes important later when Noah sends out birds to assess the condition outside. Artists often depict the ark with many windows, but Genesis specifically describes one principal opening in this instruction.
This detail is sometimes confused with a modern ship’s portholes or with the roof design of later ark illustrations. Those visual conventions are not direct measurements from the biblical passage.