Sais (Ancient Greek: ?, Coptic: ) or Sa El Hagar (Arabic: ) was an ancient Egyptian town in the Western Nile Delta on the Canopic branch of the Nile. It was the provincial capital of Sap-Meh, the fifth nome of Lower Egypt and became the seat of power during the Twenty-fourth Dynasty of Egypt (c. 732-720 BC) and the Saite Twenty-sixth Dynasty of Egypt (664-525 BC) during the Late Period. Its Ancient Egyptian name was Z?w.
The city's patron goddess was Neith, whose cult is attested as early as the First Dynasty of Egypt (c. 3100-3050 BC). The Greeks, such as Herodotus, Plato, and Diodorus Siculus, identified her with Athena and hence postulated a primordial link to Athens. Diodorus recounts that Athenians built Sais before the deluge. While all Greek cities were destroyed during that cataclysm, including Athens, Sais and the others Egyptian cities survived.
There are today no surviving traces of this town prior to the Late New Kingdom (c. 1100 BC) due to the extensive destruction of the city by the sebakhin (farmers removing mudbrick deposits for use as fertilizer) leaving only a few relief blocks in situ.
During the Islamic conquest of Egypt, a battle was fought at Sais between the Rashidun Caliphate and the Byzantine Empire, according to John of Nikiû. It remained a pagarchy and Christian bishopric at least through the early 700s. Medieval writers like Yaqut al-Hamawi, al-Maqrizi, and al-Qalqashandi attributed the city's foundation to one "S? ibn Misr"; Ibn Iyas called the founder "S? ibn Marqunus". The site was used as a stone quarry during this period. By the time of Ibn Iyas, the city had fallen almost completely into ruin.
The 1885 Census of Egypt recorded Sa el-Hagar as a nahiyah under the district of Kafr az-Zayyat in Gharbia Governorate; at that time, the population of the town was 4,474 (2,250 men and 2,224 women).
The Temple of Sais had a medical school associated with it, as did many ancient Egyptian temples. The medical school at Sais had many female students and apparently women faculty as well, mainly in gynecology and obstetrics. An inscription from the period survives at Sais, and reads, "I have come from the school of medicine at Heliopolis, and have studied at the woman's school at Sais, where the divine mothers have taught me how to cure diseases".
In Plato's Timaeus and Critias (around 395 BC, 200 years after the visit by the Greek legislator Solon), Sais is the city in which Solon receives the story of Atlantis, its military aggression against Greece and Egypt, its eventual defeat and destruction by gods-punishing catastrophe, from an Egyptian priest. Solon visited Egypt in 590 BC. Plato also notes the city as the birthplace of the pharaoh Amasis II.
Hector Berlioz' L'enfance du Christ ("The Childhood of Christ"), in part Three, has Sais as the setting for the youth of Jesus until age 10, after his parents leave their homeland to escape the Massacre of the Innocents by Herod the Great.