Kasteel Eurialo

Constructed between 402 and 397 BC by Dionysius I, this fortification served as the primary defensive point for the ancient city. Situated on the highest point of the Epipolae hill, it was built to safeguard against sieges, particularly following the Athenian siege. The structure underwent various modifications over the centuries to adapt to changing military techniques and remained a formidable stronghold during historical conflicts such as the Second Punic War.

The site is recognized for its advanced military engineering, characterized by a complex system of multiple moats and strategic defensive elements. Notable features include ingenious internal passages and towers that allowed for secure movement and communication within the walls. These elements represent the height of ancient Greek defensive architecture.

Today, the site functions as an archaeological park and military museum, preserving the ruins of the ancient castle. It is designated as a National Monument and provides insight into the strategic design of historical fortifications.