It is in principle the same instrument that is used today. The simplest version consists of two arms, connected at a right angle with pegs or with tongue and groove.
They were found in the tomb of the architect Senedjem (Nineteenth Dynasty) at Deir el-Medina (fig. 59 has a base of 46.6 centimeters and legs 32.8 centimeters long.
That ropes were actually used by builders is, however, shown by the method of producing the red leveling lines on the walls of buildings.
The marks were made by dipping a cord into red ocher, stretching it over the surface, and lightly flinging it against the surface.
In the tomb of Rekhmira, a square is shown lying in a carpenter's workshop, reminding us that squares could be used by other craftsmen as well.
Square Levels The square level not only was the leveling instrument of Pharaonic Egypt, but was used in Roman and medieval building as well.