Nilometer

This is a model of a Nilometer, a hydraulic structure from the 9th century used to measure the water level of the Nile.
The original, located on Roda Island in Cairo, was constructed in 861 with the participation of the Central Asian scholar Ahmad al-Farghani. It consists of a deep well with a central column marked with measurement units.
Water from the Nile entered the well through underground channels, allowing accurate readings. These measurements were crucial, as the level of the flood determined agricultural productivity, economic stability, and taxation.
The Nilometer functioned not only as an engineering device but also as an administrative tool.
It reflects the advanced scientific knowledge of the Islamic world and highlights the contribution of Central Asian scholars to global engineering practices.