Tomb of Seti I.

The longest tomb in the valley, at 137.19 meters,

It contains very well preserved reliefs in all but two of its eleven chambers and side rooms.

One of the back chambers is decorated with the Ritual of the Opening of the Mouth, which stated that the mummy's eating and drinking organs were properly functioning. Believing in the need for these functions in the afterlife, this was a very important ritual.