The 740 Constantinople earthquake took place on 26 October, 740, in the vicinity of

Constantinople la, Constantinopolis ota, قسطنطينيه , alternate_name = Byzantion (earlier Greek name), Nova Roma ("New Rome"), Miklagard/Miklagarth (Old Norse), Tsargrad ( Slavic), Qustantiniya ( Arabic), Basileuousa ("Queen of Cities"), Megalopolis ( ...

and the

Sea of Marmara The Sea of Marmara,; grc, Προποντίς, Προποντίδα, Propontís, Propontída also known as the Marmara Sea, is an inland sea located entirely within the borders of Turkey. It connects the Black Sea to the Aegean Sea via t ...

. Antonopoulos, 1980 In Constantinople, the earthquake caused the collapse of many public buildings. The

Walls of Constantinople The Walls of Constantinople ( el, Τείχη της Κωνσταντινουπόλεως) are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul in Turkey) since its founding as the ...

were also damaged. The casualties in Constantinople reportedly included over 1,000 people. Antonopoulos, 1980 The earthquake reportedly destroyed a number of towns in

Thrace Thrace (; el, Θράκη, Thráki; bg, Тракия, Trakiya; tr, Trakya) or Thrake is a geographical and historical region in Southeast Europe, now split among Bulgaria, Greece, and Turkey, which is bounded by the Balkan Mountains to ...

. It also damaged the cities of

Nicaea Nicaea, also known as Nicea or Nikaia (; ; grc-gre, Νίκαια, ) was an ancient Greek city in Bithynia, where located in northwestern Anatolia and is primarily known as the site of the First and Second Councils of Nicaea (the first and s ...

(

İznik İznik is a town and an administrative district in the Province of Bursa, Turkey. It was historically known as Nicaea ( el, Νίκαια, ''Níkaia''), from which its modern name also derives. The town lies in a fertile basin at the eastern end ...

Nicomedia Nicomedia (; el, Νικομήδεια, ''Nikomedeia''; modern İzmit) was an ancient Greek city located in what is now Turkey. In 286, Nicomedia became the eastern and most senior capital city of the Roman Empire (chosen by the emperor Diocleti ...

(

İzmit İzmit () is a district and the central district of Kocaeli province, Turkey. It is located at the Gulf of İzmit in the Sea of Marmara, about east of Istanbul, on the northwestern part of Anatolia. As of the last 31/12/2019 estimation, the ...

), and Praenetus. Antonopoulos, 1980 The historians

Theophanes the Confessor Theophanes the Confessor ( el, Θεοφάνης Ὁμολογητής; c. 758/760 – 12 March 817/818) was a member of the Byzantine aristocracy who became a monk and chronicler. He served in the court of Emperor Leo IV the Khazar before taking ...

(8th-9th century) and

George Kedrenos George Kedrenos, Cedrenus or Cedrinos ( el, Γεώργιος Κεδρηνός, fl. 11th century) was a Byzantine Greek historian. In the 1050s he compiled ''Synopsis historion'' (also known as ''A concise history of the world''), which spanned the ...

(11th century) reported that the earthquake caused the sea to retire away from the coast in many places. The sea soon returned, and flooded many towns. Antonopoulos, 1980 The description given matches that of a seismic sea-wave (

tsunami A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater exp ...

). Antonopoulos, 1980 The date of the earthquake is recorded by (among others)

Anastasius Bibliothecarius Anastasius Bibliothecarius or Anastasius the Librarian (c. 810 – c. 878) was ''bibliothecarius'' (literally "librarian") and chief archivist of the Church of Rome and also briefly a claimant to the papacy. Early life He was a nephew of Bis ...

(9th century), Joannes Zonaras (12th century),

Carolus Sigonius Carolus Sigonius (Carlo Sigonio or Sigone) (c. 152412 August 1584) was an Italian humanist, born in Modena. Biography Having studied Greek under the learned Franciscus Portus of Candia, he attended the philosophical schools of Bologna and ...

(16th century),

Caesar Baronius Cesare Baronio (as an author also known as Caesar Baronius; 30 August 1538 – 30 June 1607) was an Italian cardinal and historian of the Catholic Church. His best-known works are his ''Annales Ecclesiastici'' ("Ecclesiastical Annals"), wh ...

(16th-17th century), and

Sethus Calvisius Sethus Calvisius or Setho Calvisio, originally Seth Kalwitz (21 February 1556 – 24 November 1615), was a German music theorist, composer, chronologer, astronomer, and teacher of the late Renaissance. Biography He was born into a peasant family ...

(16th-17th century). Antonopoulos, 1980

References

General

Specific

{{coord, 41.0082, 28.9784, display=title 740 740s in the Byzantine Empire 8th-century earthquakes Constantinople Earthquakes in the Byzantine Empire Nicaea