The Eratosthenes Festivity has become an annual tradition that takes place every year on 21 June at the Bibliotheca Alexandrina  It is designed for preparatory school students, and includes a series of activities that revolve around the methodology Eratosthenes used in measuring the Earth’s circumference 2000 years ago.

The participants schools of the eTwinning project exchanged their measures with the Egyptian schools

Results on Bibliotheca Alexandrina / Planetarium Science Center website