A number gauge for measuring the rise in the waters of the at its annual flood. In Coptic times it had the shape of a graduated column divided into cubits. It is built of stone in the middle of a well alongside the river. On Coptic textiles the is represented surmounted by a cone with a child, symbol of the cubit in Greco- and Coptic statuary, standing near the column. On coins, the child pointed out the favorable number of cubits. In Coptic art, his gesture is amplified. Holding a chisel in his left hand and a mallet in his right, he carves the number of cubits for the place where the is located.

A good example is a medallion in the Louvre (fifth-sixth century), worked in two colors, with a blue-green staircase and a red column. The blue-green color recalls the green waters of the initial rise (June), and red the flood itself (July-September). The two Greek and Coptic figures indicate the best flood level at Hermopolis.

In visual form, this conjunction of symbolism and realism presents the pharaonic significance of the as an instrument of economic foresight and a witness to divine benevolence toward Egypt. Greek papyri of the Coptic period (sixth century) tell us that the flood rises by the power of Christ, and that the depends on the church. The Nilometer is part of the Egyptian landscape, like the lotus and the thickets of water plants.


  • Bonneau, D. “ Nilometre: aspect architectural.” Archeologia (Warsaw) 27 (1976):1-11.
  • Bourguet, P. du. des étoffes coptes, Vol. 1, no. D36. Musée National du Louvre. Paris, 1964.