The Walls of the Ruler was a fortification, or possibly a whole string of them, built by Amenemhat I in the 14th nome of Lower Egypt to protect the eastern approaches to Egypt.
The Walls of the Ruler are mentioned in the Tale of Sinuhe No remains have been found.
A fictionalized version of the Walls of the Ruler are present in the first DLC (The Hidden Ones) of the 2017 video game Assassin's Creed Origins. Unlike real-life accounts of it, it is located on the Sinai Peninsula, rather than mainland Egypt.