Coordinates: 30°56?19?N 31°30?59?E / 30.93861°N 31.51639°E
Thmuis (; Greek: ; Arabic: Tell El-Timai) is a city in Lower Egypt, located on the canal east of the Nile, between its Tanitic and Mendesian branches.
Ptolemaic period, Thmuis succeeded Djedet as the capital of Lower Egypt's 16th nome of Kha ( Herodotus (II, 166)). The two cities are only several hundred meters apart. Ptolemy also states that the city was the capital of the Mendesian nome.
Thmuis was an
episcopal see in the Roman province of Augustamnica Prima, suffragan of Pelusium. Today it is part of the Coptic Holy Metropolitanate of Beheira (Thmuis & Hermopolis Parva), Mariout (Mariotis), Marsa Matruh ( Antiphrae & Paractorium), Libya (Livis) and Pentapolis ( Cyrenaica).
fourth century it was still an important Roman city, having its own administration and being exempt from the jurisdiction of the Prefect of Alexandria. It was in existence at the time of the Muslim invasion of Egypt in 642 AD, and was later called Al-Mourad or "Al-Mouradeh"; it must have disappeared after the Ottoman conquest of Egypt.
Its ruins are at Tell El-Timai, about five miles north-west of
Sinbellawein, a station on the railway from Zagazig to Mansourah in the central Delta.
Le Quien ( Oriens christianus, II, 537) names nine bishops of Thmuis, the last three being Monophysites of the Middle Ages. The others are:
Ammonius, Bishop of Thmuis,
deposed by  Heraclas of Alexandria (d. 247) 
Phileas of Thmuis, d. 306 (in the Martyrology, 4 February), martyr and saint
Saint Donatus, his successor, martyr
Liberius (not Caius), at the First Council of Nicaea in 325
Saint Serapion of Thmuis, died shortly before 360, the author of various works, in part preserved, a friend of St. Athanasius
Ptolemæus at the Council of Seleucia (359) Aristobulus, at the First Council of Ephesus (431).
Herbermann, Charles, ed. (1913). . . New York: Robert Appleton Company. Catholic Encyclopedia Baines & Malek "Cultural Atlas of Ancient Egypt", 2000.
ISBN 0-8160-4036-2 M.I. Bakr & H. Brandl, "Various Sites in the Eastern Nile Delta: Thmuis", in: M.I. Bakr and H. Brandl, with F. Kalloniatis (eds.), Egyptian Antiquities from the Eastern Nile Delta. Museums in the Nile Delta, vol. 2. Cairo/Berlin 2014, pp. 79, 294-301. ISBN 9783000453182.
This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). " Thmuis". . New York: Robert Appleton Company. Catholic Encyclopedia