Nicomedia in the context of "Ancient Bithynia"

Bithynia (/bɪˈθɪniə/; Koine Greek: Βιθυνία, romanized: Bithynía) is a geographical region of northwestern Asia Minor (in present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It borders Mysia to the southwest, Paphlagonia to the northeast along the Black Sea coast, and Phrygia to the southeast towards the interior of Asia Minor.

Hellenistic Bithynia was an independent kingdom from the 3rd century BC. Its capital Nicomedia was rebuilt on the site of ancient Astacus in 264 BC by Nicomedes I. Bithynia was bequeathed to the Roman Republic in 74 BC, and became united with the Pontus (region) region as the province of Bithynia and Pontus.

The Martyrs of Nicomedia an incidence of the persecution of Christians in the Roman Empire, perpetrated against the Christian population of Nicomedia on Christmas Day, 304 AD. In the event, around several thousand to 20,000 people (depending on the account) were massacred by Roman soldiers under Emperor Maximian, most of whom were brutally tortured (or even burned alive in a church, according to some sources). This was not the first time that large numbers of Christians were massacred in Nicomedia or other parts of the Roman Empire.

İzmit (Turkish pronunciation: [ˈizmit]) is a municipality and the capital district of Kocaeli Province, Turkey. Its area is 480 km, and its population is 376,056 (2022). The capital of Kocaeli Province, it is located at the Gulf of İzmit in the Sea of Marmara, about 100 km (62 mi) east of Istanbul, on the northwestern part of Anatolia. Kocaeli Province (including rural areas) had a population of 2,079,072 inhabitants in 2022, of whom approximately 1.2 million lived in the largely urban İzmit City metro area made up of Kartepe, Başiskele, Körfez, Gölcük, Derince and Sapanca (in Sakarya Province). Similar to Istanbul, the area of İzmit is coterminous with its province. It is also the most populated of any city or town in Turkey whose name isn't shared with the province it is located in.

İzmit was known as Nicomedia and Ólbia in antiquity, and was the eastern and most senior capital city of the Roman Empire between 286 and 324, during the Tetrarchy introduced by Diocletian. Following Constantine the Great's victory over co-emperor Licinius at the Battle of Chrysopolis in 324, Nicomedia served as an interim capital city for Constantine between 324 and 330. During the Ottoman Empire, İzmit was the capital of the Sanjak of Kocaeli. In the present day, Istanbul-İzmit area is one of the main industrial regions in Turkey.

Theodosius III (Greek: Θεοδόσιος, romanized: Theodósios) was Byzantine emperor from c. May 715 to 25 March 717. Before rising to power and seizing the throne of the Byzantine Empire, he was a tax collector in Adramyttium. In 715, the Byzantine navy and the troops of the Opsician Theme, one of the Byzantine provinces, revolted against Emperor Anastasius II (r. 713–715), acclaiming the reluctant Theodosius as emperor. Theodosius led his troops to Chrysopolis and then Constantinople, the capital, seizing the city in November 715. Anastasius did not surrender until several months later, accepting exile in a monastery in return for safety. Many themes viewed Theodosius to be a puppet of the troops of the Opsician Theme, and his legitimacy was denied by the Anatolics and the Armeniacs under their respective strategoi (generals) Leo the Isaurian and Artabasdos.

Leo declared himself emperor in the summer of 716 and allied himself with the Umayyad Caliphate, the Islamic empire; Theodosius sought aid from the Bulgarians under Khan Tervel (r. 700–721), setting a firm border at Thrace and ceding the Zagoria region to the Bulgarians, as well as stipulating the payment of tribute to them. Leo then marched his troops to Constantinople, seizing the city of Nicomedia, and capturing many officials, including Theodosius' son, also named Theodosius. With his son in captivity, Theodosius took the advice of Patriarch Germanus and the Byzantine Senate, and negotiated with Leo, agreeing to abdicate and recognize Leo as emperor. Leo entered Constantinople and definitively seized power on 25 March 717, allowing Theodosius and his son to retire to a monastery. Exactly when Theodosius died is uncertain, but it may have been on 24 July 754.

The Kingdom of Bithynia (Ancient Greek: Βιθυνία) was a Hellenistic kingdom centred in the historical region of Bithynia, which seems to have been established in the fourth century BC. In the midst of the Wars of the Diadochi, Zipoites assumed the title of king (basileus) in 297 BC. His son and successor, Nicomedes I, founded Nicomedia, which soon rose to great prosperity. During his long reign (c. 278 – c. 255 BC), as well as those of his successors, Prusias I (r. c. 228 – 182 BC), Prusias II (r. c. 182 – 149 BC) and Nicomedes II (r. c. 149 – 127 BC), the Kingdom of Bithynia prospered and had a considerable standing and influence among the minor monarchies of Anatolia. But the last king, Nicomedes IV, was unable to maintain himself in power against Mithridates VI of Pontus. After being restored to his throne by the Roman Senate, he bequeathed his kingdom through his will to the Roman republic in 74 BC and it became the province of Bithynia et Pontus in 74 BC.

The coinage of these kings show their regal portraits, which tend to be engraved in an extremely accomplished Hellenistic style.

This article concerns the period 279 BC – 270 BC.

• An army of Gauls under Brennus invade Greece. A section of the army, commanded by Bolgios, crushes a Macedonian army led by Ptolemy Keraunos, who is killed in the battle. At the narrow pass of Thermopylae, on the east coast of Central Greece, Brennus' forces suffer heavy losses while trying to break through the Greek defence comprising the Phocians and the Aetolians. Eventually Brennus finds a way around the pass but the Greeks escape by sea. Brennus pushes on to Delphi where he is defeated and forced to retreat, after which he dies of wounds sustained in the battle. His army falls back to the river Spercheios where it is routed by Thessalians and Malians. Some of the survivors settle in a part of Asia Minor that will eventually be called Galatia, while some settle in Thrace, founding a short-lived city-state named Tylis.
• With the death of Ptolemy Keraunos, the previous King of Macedonia, Antipater II becomes king again. However, his new reign lasts only a few months before he is killed by his cousin Sosthenes who becomes the new King of Macedonia.
• The Phocians are readmitted into the Amphictyonic League after they have joined in the defence of Delphi against the Gauls.

• The Carthaginians and the Romans agree to support each other against a common foe. The Carthaginians give Rome money and ships in their fight against Pyrrhus, the king of Epirus.
• Pyrrhus realizes that he cannot capture Rome and suggests peace terms to the Romans. Pyrrhus sends his chief advisor, Cineas, to Rome to negotiate a peace. Cineas demands that the Romans halt their aggression against the Greeks of southern Italy and restore the lands the Romans have taken from the Bruttii, the Apulians, and the Samnites. The Romans reject his demands, largely at the instigation of the former Roman censor, Appius Claudius Caecus.
• In renewed fighting, Pyrrhus of Epirus, leading the combined Tarantine, Oscan, Samnite, and Greek forces, wins a 'Pyrrhic victory' against the Romans led by consul Publius Decius Mus at the Battle of Asculum, called such because his victory comes at a great cost to his own forces. Pyrrhus is reported to have said afterwards, "One more victory against the Romans and we shall be utterly ruined!" Disheartened, Pyrrhus retires to Tarentum and sends Cineas to make renewed peace overtures to Rome. These talks are inconclusive.

• The aggression of Ptolemy II of Egypt continues to cause friction with Antiochus as he takes Miletus in south-western Asia Minor from him.

• Scordisci Celts found a city called Singidon (Roman Singidunum) which is today the Serbian city of Belgrade.

• General Bai Qi of the State of Qin attacks the State of Chu and captures the cities of Yan and Deng.
• General Lian Po of the State of Zhou defeats an army of the State of Qi.

• After their defeats in Greece, the Gauls move into Asia Minor. The Seleucid king Antiochus wins a major battle over the Gauls leading to his being given the title of Soter (Greek for "saviour"). The Gauls settle down to become the "Galatians" and are paid 2,000 talents annually by the Seleucid kings to keep the peace.
• Antigonus concludes a peace with Antiochus who surrenders his claim to Macedonia. Thereafter Antigonus II's foreign policy is marked by friendship with the Seleucids.
• Nicomedes I becomes the first ruler of Bithynia to assume the title of king. He founds the city of Nicomedia, which soon rises to great prosperity.

• The Carthaginians seize an opportunity to interfere in a quarrel between Syracuse and Agrigentum and besiege Syracuse. The Syracusans ask for help from Pyrrhus and Pyrrhus transfers his army there.
• On his arrival in Sicily, Pyrrhus' forces win battles against the Carthaginians across Sicily. Pyrrhus conquers almost all of Sicily except for Lilybaeum (Marsala).
• Pyrrhus is proclaimed king of Sicily. He plans for his son Helenus to inherit the kingdom of Sicily and his other son Alexander to inherit Italy.

• The heartland of the State of Chu in the modern Hubei province is overrun by the powerful state of Qin from the west under Bai Qi's leadership. Sailing down the Han river from Bashu, Bai Qi captures Ying - the capital of Chu - as well as Yiling, and his army reaches as far as Jingling. Bai Qi is honoured as Lord Wu'an (武安君; literally: Lord of Martial Peace). The Chu government moves to the east, occupying various temporary capitals until settling in Shouchun in 241 BC.
• Qu Yuan writes the poem "Lament for Ying" after the fall of the capital of Chu.

• Antigonus crosses the Hellespont and defeats the Celts under the command of Cerethrius at the Battle of Lysimachia near Lysimachia at the neck of the Thracian Chersonese. After this success, he is acknowledged by the Macedonians as their king.

• Pyrrhus captures Eryx, the strongest Carthaginian fortress in Sicily. This prompts the rest of the Carthaginian-controlled cities in Sicily to defect to Pyrrhus.

• Battle of the Cranita Hills: Roman forces are defeated by the Samnites at the Cranita Hills during the Pyrrhic War.
• Consul Publius Cornelius Rufinus campaigns against the Lucanians and the Bruttians and captures Crotone.

• The Egyptian King Ptolemy II's first wife, Arsinoe I (daughter of the late King Lysimachus of Thrace) is accused, probably at instigation of Ptolemy II's sister (who also has the name Arsinoe), of plotting his murder and is exiled by the King. Arsinoe then marries her own brother, a customary practice in Egypt, but scandalous to the Greeks. The suffix "Philadelphoi" ("Brother-Loving") consequently is added to the names of King Ptolemy II and Queen Arsinoe II. The former queen, Arsinoe I, is banished to Coptos, a city of Upper Egypt near the Wadi Hammamat, while her rival adopts her children.
• The first of the Syrian Wars starts between Egypt's Ptolemy II and Seleucid emperor Antiochus I Soter. The Egyptians invade northern Syria, but Antiochus defeats and repels his opponent's army.

• Antigonus II Gonatas consolidated his control over Macedon and Thessaly.

• Pyrrhus negotiates with the Carthaginians to end the fighting between them in Sicily. The Carthaginians are inclined to come to terms with Pyrrhus, but he demands that Carthage abandon all of Sicily and make the Libyan Sea the boundary between Carthage and the Greeks. Meanwhile, he begins to display despotic behaviour towards the Sicilian Greeks and soon Sicilian opinion moves against him. Therefore, fearing that his successes in Sicily may lead him to become the despot of their country, the Syracusans ask Pyrrhus to leave Sicily. He does so, and returns to the Italian mainland, noting that he expects Sicily to be a "fair wrestling ring" for Carthage and Rome.

• General Bai Qi of the State of Qin attacks the State of Wei and captures two cities.
• General Lian Po of the State of Zhou captures the Wei city of Qi.

• The Museum of Alexandria is founded by the Egyptian King Ptolemy II.

• When Pyrrhus returns from Sicily, he finds himself vastly outnumbered by a superior Roman army under the command of consul Manius Curius Dentatus. After the inconclusive Battle of Beneventum, Roman commander and statesman, Gaius Fabricius Luscinus, negotiates a peace with Pyrrhus, after which Pyrrhus decides to end his campaign in Italy and return to Epirus, which results in the loss of all his Italian holdings.

• Following the departure of Pyrrhus from Sicily, the Syracusan army and the city's citizens appoint Hiero II as the commander of their slaves. He strengthens his position by marrying the daughter of Leptines, the city's leading citizen.

• Antiochus's alliance with Antigonus II, now fully in possession of Macedonia, is cemented by Antigonus's marriage to Phila, Antiochus's half sister.

• General Bai Qi of the State of Qin brings order to the rebellious provinces of Wu and Qianzhong, which had been formed from the territories conquered from the State of Chu between 280 and 278 BC.
• General Lian Po of the State of Zhou invades the State of Wei and captures the cities of Fangling and Anyang.

• Pyrrhus returns from Italy and Sicily and invades Macedonia defeating Antigonus II Gonatas at the Battle of the Aous and conquering Upper Macedonia and Thessaly while Antigonus holds onto the coastal Macedonian towns. Antigonus' troops desert him and Pyrrhus is declared King of Macedonia.

• The Romans under Manius Curius Dentatus conquer the Lucanians.

• Magas of Cyrene marries Apama, the daughter of Antiochus and uses his marital alliance to foment a pact to invade Egypt. He opens hostilities against his half brother Ptolemy II, by declaring his province of Cyrenaica to be independent and then attacks Egypt from the west as Antiochus I takes the Egyptian controlled areas in coastal Syria and southern Anatolia, after which he attacks Palestine.
• Magas has to stop his advance against Ptolemy II due to an internal revolt by the Libyan Marmaridae nomads.

• Impressed by Rome's defeat of Pyrrhus of Epirus, Pharaoh Ptolemy II Philadelphus sends a friendly embassy. The visit is reciprocated.

• General Bai Qi of the State of Qin attacks the State of Wei and State of Zhou. He captures the city of Huyang and wins three battles, defeating the army of the Zhao general Jia Yan.

• The Seleucid king Antiochus I Soter is defeated by Egypt's Ptolemy II during the First Syrian War. Ptolemy II annexes Miletus, Phoenicia and western Cilicia from Antiochus. As a result, Ptolemy II extends Egyptian rule as far as Caria and into most of Cilicia.

• Egypt's victories solidify the kingdom's position as the undisputed naval power of the eastern Mediterranean; the Ptolemaic sphere of power now extends over the Cyclades to Samothrace, and the harbours and coastal towns of Cilicia Trachea, Pamphylia, Lycia and Caria.

• Tarentum, a Greek city in Italy, makes peace with the Romans.
• Rome builds the aqueduct Anio Vetus on the Esquiline hill.
• Pyrrhus' departure from southern Italy three years earlier leads to the Samnites finally being conquered by the Romans. With the surrender of Tarentum, the cities of Magna Graecia in southern Italy come under Roman influence and become Roman allies. Rome now effectively dominates all of the Italian peninsula.

• Cleonymus, a Spartan of royal blood who has been outcast by his fellow Spartans, asks the King of Macedonia and Epirus, Pyrrhus, to attack Sparta and place him in power. Pyrrhus agrees to the plan, but intends to win control of the Peloponnese for himself. As a large part of the Spartan army led by king Areus I is in Crete at the time, Pyrrhus has great hopes of taking the city easily, but the citizens organise stout resistance, allowing one of Antigonus II's commanders, Aminias the Phocian, to reach the city with a force of mercenaries from Corinth. Soon after this, the Spartan king, Areus, returns from Crete with 2,000 men. These reinforcements stiffen Spartan resistance and Pyrrhus, finding that he is losing men to desertion every day, breaks off the attack and starts to plunder the country.
• As they plunder the countryside, Pyrrhus and his troops move onto Argos. Entering the city with his army by stealth, Pyrrhus finds himself caught in a confused battle with the Argives (who are supported by Antigonus' forces and a detachment from Sparta) in the narrow city streets. During the confusion an old woman watching from a rooftop throws a roof tile at Pyrrhus which stuns him, allowing an Argive soldier to kill him.
• Following his death in Argos, Pyrrhus is succeeded as king of Epirus by his son Alexander II while Antigonus II Gonatas regains his Macedonian throne which he has lost to Pyrrhus two years earlier.

• The Mauryan emperor, Bindusara, sends the Mauryan army to conquer the southern kingdoms. Kadamba is conquered.

• With the restoration of the territories captured by Pyrrhus, and with grateful allies in Sparta and Argos, and garrisons in Corinth and other Greek key cities, Antigonus II securely controls Macedonia and the other states of Greece. Antigonus becomes the chief of the Thessalian League and is on good terms with neighbouring Illyria and Thrace. He secures his position in central and south Greece by keeping Macedonian occupation forces in the cities of Corinth, Chalcis on the island of Euboea, and Demetrias in Thessaly, the three "shackles" of Hellas.

• The Mauryan empire annexes the southern kingdoms till the realms of the three crowned kings of Chola,Chera and Pandya

• Rome's subjugation of Italy is completed by the recapture of Rhegium (southern Italy) from the Mamertines and the defeat of the Brutians, the Lucanians, the Calabrians and the Samnites. The town of Rhegium is then restored by the Romans to its Greek inhabitants.

• Carthage, already in control of Sardinia, southern Spain and Numidia, is ruled by an oligarchy of merchants under two Suffetes or chief magistrates. While Carthage's military commanders are strong, the state relies on mercenaries (including Spanish ones) for its soldiers.

The 4th century was the time period from 301 CE (represented by the Roman numerals CCCI) to 400 CE (CD) in accordance with the Julian calendar. In the West, the early part of the century was shaped by Constantine the Great, who became the first Roman emperor to adopt Christianity. Gaining sole reign of the empire, he is also noted for re-establishing a single imperial capital, choosing the site of ancient Byzantium in 330 (over the current capitals, which had effectively been changed by Diocletian's reforms to Milan in the West, and Nicomedeia in the East) to build the city soon called Nova Roma (New Rome); it was later renamed Constantinople in his honor.

The last emperor to control both the eastern and western halves of the empire was Theodosius I. As the century progressed after his death, it became increasingly apparent that the empire had changed in many ways since the time of Augustus. The two-emperor system originally established by Diocletian in the previous century fell into regular practice, and the east continued to grow in importance as a centre of trade and imperial power, while Rome itself diminished greatly in importance due to its location far from potential trouble spots, like Central Europe and the East. Late in the century Christianity became the official state religion, and the empire's old pagan culture began to disappear. General prosperity was felt throughout this period, but recurring invasions by Germanic tribes plagued the empire from 376 CE onward. These early invasions marked the beginning of the end for the Western Roman Empire.

The Battle of Chrysopolis was fought on 18 September 324 between the Roman emperors Constantine I and Licinius near Chrysopolis (modern Üsküdar), opposite Byzantium (modern Istanbul) on the Asiatic shore of the Bosphorus. The battle followed Constantine's victory at the Battle of the Hellespont, where his son Crispus destroyed the Licinian fleet. Licinius withdrew his forces from Byzantium to Chalcedon and gathered the remnants of his army, reinforced by Visigothic auxiliaries and the troops of the co-emperor Martinian.

Constantine crossed the Bosphorus into Asia Minor and marched on Chrysopolis. Licinius drew up his army with the traditional pagan standards, while Constantine advanced under the labarum. Constantine launched a direct attack that routed Licinius' troops. Ancient sources report heavy losses for Licinius, and he retreated with the survivors to Nicomedia.

Saoterus (Greek: Σαώτερος ὁ Νικομηδεύς; died 182) was a Bithynian Greek freedman from Nicomedia who served as the Roman Emperor Commodus's palace chamberlain (a cubiculo). His career is sketched by Herodian, Dio Cassius and the Historia Augusta. Commodus preferred to exercise his rule through palace officials and Saoterus was the first of these; Saoterus was seen as in the Emperor's favour at the outset of his reign, as he accompanied Commodus in his chariot when he made his ceremonial entry into Rome on 22 October 180. Commodus placed him in a high position in his government, resulting in resentment from noble senatorial families. The Historia Augusta, apparently drawing on the testimony of Marius Maximus, insinuates that Commodus had a homosexual infatuation with Saoterus. After the attempt on Commodus's life in 182, Saoterus was implicated in the plot by the praetorian prefect Tigidius Perennis, and was murdered by the freedman Cleander, who succeeded him as chamberlain.