Heliopolis (Greek: Ἡλίου πόλις or Ἡλιούπολις}, meaning sun-city, was one of the most ancient cities of Egypt, and capital of the 13th Lower Egyptian nome. Its name also refers to an unrelated modern suburb of Cairo, also known as مصر الجديدة, Masr al-gidedah (literally "New Egypt" in Arabic). The ancient city was located five miles (8 km) east of the Nile north of the apex of the Delta. Heliopolis originally refers to an area that covers the areas of Ain Shams, Al-Matariyyah and Tel Al-Hisn. In ancient times it was the principal seat of sun-worship, hence its name.