The modern Cairo district of Al-Matareya boasts a rich history that reaches back to deep antiquity. In fact, it is located on the site of one of the greatest cities of Ancient Egypt—Heliopolis, known to the Egyptians as Iunu and mentioned in the Bible as the city of On. For millennia, it was not merely a settlement but a spiritual and scientific capital.
Heliopolis, which translates from Greek as "City of the Sun," was founded as early as the Predynastic period, around the 4th millennium BC. The city was the primary center for the worship of the sun god Ra-Atum. Its priesthood possessed immense influence, at times rivaling the power of the pharaohs themselves. It was here that the famous Heliopolitan cosmogony—one of the most significant theological doctrines of Ancient Egypt—was created.
The ancient city owed its prosperity and influence to several key factors. One of the most important was its religious significance. As the center of the cult of the supreme god Ra, Heliopolis attracted pilgrims and resources from across the country. It was home to the sacred Benben stone, which served as the prototype for the capstones of obelisks and pyramids.
Additionally, the city was renowned as an outstanding scientific center of antiquity, famous for its achievements in astronomy, theology, and medicine. It is believed that many Greek sages, including Plato, gained knowledge here.
The strategic position of Heliopolis also played a significant role. Located at the head of the Nile Delta, it was a vital geographical and commercial hub that effectively connected Upper and Lower Egypt.
The economy of Heliopolis was inextricably linked to its temple complex, which owned vast lands and workshops. The city's cultural heritage is immense, though little has survived to the present day. The only monument still standing in its original location is the magnificent obelisk of Pharaoh Senusret I, a silent witness to former glory. Later, this area also acquired special significance for Christians: according to tradition, the Holy Family stayed here during the Flight into Egypt. The famous Virgin Mary's Tree, under which they are believed to have rested, remains a place of pilgrimage today.