Qalyūb

Qalyūb, town at the apex of the Nile River delta, in Al-Qalyūbiyyah muḥāfaẓah (governorate), Lower Egypt. It lies just north of Cairo, near the right bank of the Nile and the Nile Delta Barrage, which controls the division of the Nile’s waters into the Rosetta and Damietta branches. Qalyūb was reputedly constructed with materials taken from the ruins of Heliopolis (modern Miṣr al-Jadīdah), a few miles southeast. Its earliest mention is in 641 ce, a...