What is "walls-of-the-ruler"

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. It succeeded the Old Kingdom Walls-of- Snefru.

The Walls-of-the-Ruler are mentioned in the Tale of Sinuhe and in the so-called Prophecy of Neferti. No remains have been found to date, but some think that the city of Sile (Tjaru) was part of it. New Kingdom depictions show forts which had a secured supply of water and were surrounded by crocodile-infested ditches or canals which were spanned by bridges.