Seleucia

• 1. Imperial Founding And Relocation

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  Seleucia emerged from the ashes of Babylon around 305 BC when Seleucus I Nicator ordered a massive population transfer. He forced almost all inhabitants of Babylon to leave their ancient homes and resettle in this new city on the west bank of the Tigris River. Only local temple priests and supporting workers were exempted from the decree. A tablet dated 275 BC confirms that these displaced people were transported to build a palace and construct a temple named Esagila within the new walls. The site sat at the confluence of the Tigris River with a major canal from the Euphrates, positioning it to receive traffic from both great waterways. Seleucus enlarged an earlier settlement to create his first capital before eventually moving the imperial seat to Antioch in northern Syria.

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• 2. Hellenistic Trade And Population

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  Archaeological excavations reveal that the city walls enclosed an area of at least one square mile, roughly 1.5 miles or 2.5 kilometers on each side. This vast perimeter suggests an initial population exceeding 100,000 residents, potentially growing much larger over time. Ancient texts claim the metropolis reached a staggering figure of 600,000 inhabitants during its peak. Polybius used the term Macedonian peliganes for the council of Seleucia, implying a colony consistent with its rise under Seleucus I. Pausanias recorded that Seleucus also settled Babylonians there alongside Greek colonists. Excavations indicate the presence of a large population not entirely defined by Greek culture alone. The surrounding region might have supported half a million people living in the shadow of these massive fortifications.

• 3. Parthian Conquest And Rule

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  Mithridates I conquered the city in 141 BC and made it the western capital of the Parthian Empire. Tacitus described the walls and noted that Seleucia remained a fully Hellenistic city even under new Parthian administration. A senate of 300 people ruled the city while ancient sources claimed 600,000 inhabitants lived within its bounds. In 55 BC, a crucial battle near Seleucia established dynastic succession among the Arsacid kings. The reigning Mithridates III fought against Orodes II with support from a Roman army led by Aulus Gabinius. A massacre of around 5,000 Babylonian Jewish refugees occurred at Seleucia in 41 BC according to Josephus. Tetradrachms minted by Mithridates I bear inscriptions showing the blend of cultures during this era.

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• 4. Roman Wars And Destruction

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  The Roman emperor Trajan burned down Seleucia in 117 AD during his conquest of Mesopotamia. Hadrian ceded the city back to the Parthians the following year, allowing them to rebuild it in the Parthian style. Roman general Avidius Cassius completely destroyed the city in 165 AD, ending centuries of prosperity. Edward Gibbon documented these events in The History of the Decline and Fall of the Roman Empire. Over sixty years later, Persian emperor Ardashir I built a fresh city called Veh-Ardishir across the river. This new settlement was long believed to be located at Seleucia but Italian excavations proved it was separate from both Seleucia and Ctesiphon. The original site eventually faded into obscurity and was swallowed by desert sands after the Tigris shifted its course.

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• 5. Christian Ecclesiastical Center

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  Following an edict of toleration by Sassanian King Yazdegerd I, Christians reorganized their church in the 4th century. The Council of Seleucia-Ctesiphon met in 410 AD under the presidency of Mar Isaac, bishop of Seleucia-Ctesiphon. This synod declared the bishop of Seleucia-Ctesiphon as the primate of the Church of the East with the title Catholicos. Dadyeshu was elected Catholicos in 421 and suffered imprisonment during renewed persecution that began toward the end of Yazdegerd I's reign. He resigned upon release but the church refused his resignation, leading to the Synod of Dadyeshu in 424. That assembly decided the Catholicos should be the sole head of the Church of the East answerable to God alone.

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• 6. Archaeological Rediscovery And Excavations

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  American archaeologists rediscovered the site of Seleucia in the 1920s while searching for ancient Opis. University of Michigan professors Leroy Waterman and Clark Hopkins oversaw excavations from 1927 through 1937 on behalf of the American School of Oriental Research. Funds came from the Toledo Museum of Art and the Cleveland Museum of Art. Finds included many bronze coins, salt receipts bearing the name of Seleucia, a blue glazed incense burner now housed in Baghdad museum, and numerous beads. Italian missions directed by Antonio Invernizzi and Giorgio Gullini worked at the site between 1964 and 1989. They discovered a Seleucid archive building containing about 30,000 seal impressions all executed in fully Greek style. An outer wall from the Parthian period contained a reused brick dated to 821 BC during the Neo-Assyrian era.

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