In tomb KV17, researchers found a weird and unexpected tunnel which
sinks deep underground beneath the burial chamber. This is one of the
major puzzles related to Sety I’s tomb today. Could it lead to another
burial chamber? An interesting feature found in the tomb’s decoration
are cenotaphs, which can be translated to read “empty tomb.” The writing
was likely seen as way to protect the pharaoh’s remains. This was a
very important part of ancient Egyptian religion, as the deceased’s body
had to be saved, otherwise, the person wouldn't be able to stay alive
in the afterlife.
the tunnel, it was probably meant to reach groundwater - creating a
symbolic link between the pharaoh’s burial and the myth of the tomb of
Osiris. In royal tombs, the cenotaph was placed on a false sarcophagus
on an ''island'' surrounded by water. It was associated with the
original forces of creation and the myth of Osiris. But for Sety I, his
most famous cenotaph is in his temple in Abydos.