The Old World

Shakespeare invented the Latin phrase in 1599. The Roman sources are different. Suetonius reports that Caesar said nothing — or, if anything, the Greek phrase *καὶ σύ, τέκνον* ('you too, my child?') to Brutus before pulling his toga over his head. Plutarch agrees on the toga gesture and says Caesar gave up resistance when he saw Brutus among his attackers. The Latin tag *Et tu, Brute?* is one of the most-quoted lines in English literature and has nothing to do with the historical record.

The Ptolemaic dynasty was founded in 323 BC by Ptolemy I Soter, one of Alexander the Great's senior Macedonian generals, who took Egypt at Alexander's death. The dynasty ruled Egypt for 275 years and never spoke Egyptian at court — Greek was the language of administration the whole time. Cleopatra VII, the last Ptolemy, was the first to bother learning the Egyptian language. She killed herself in 30 BC after losing the war with Octavian, ending three centuries of Greek rule over Egypt.

Caesar arrived in Alexandria in 48 BC chasing Pompey (who had just been murdered at the Egyptian beach where he landed) and stayed long enough for Cleopatra to bear Caesarion in June 47 BC. Mark Antony arrived in 41 BC and produced twins (Alexander Helios, Cleopatra Selene II) in 40 BC and a younger son (Ptolemy Philadelphus) in 36 BC. Caesarion was executed by Octavian after Cleopatra's suicide. The twins were raised in Rome by Octavian's sister Octavia.

The Hebrew-slaves tradition comes from the Book of Exodus, which describes Israelite forced labour in Egypt — but the Exodus narrative is set centuries after the Giza pyramids were built (Giza c. 2580–2560 BC, the Exodus traditionally dated to c. 1446 or 1250 BC), and there is no archaeological evidence for Israelite labour at the pyramids. The actual workforce, based on the excavated pyramid-builders' settlement at Giza, included paid skilled stonemasons working year-round (housed in permanent barracks with substantial meat rations) and conscripted seasonal farm labourers who served during the annual Nile flood when agricultural work was impossible.

Pompeii was buried under roughly 20 feet of pumice and ash by the end of the eruption — enough to bury entire two-story buildings up to their rooftops. Herculaneum, on the western flank of Vesuvius, was buried under much more (about 70 feet of pyroclastic flow material) because the volcano's first major lateral surge went west. The 20-foot depth at Pompeii preserved the town in extraordinary detail and is why the bodies, the wall paintings, and even the loaves of bread in the ovens survived to be excavated.

Alexander was born in July 356 BC and died in Babylon in June 323 BC — one month short of his 33rd birthday. He had been on continuous military campaign for 12 of the previous 13 years. Cause of death is disputed: ancient sources are split between an unidentified fever (probably malaria or typhoid, contracted in the Mesopotamian marshes), heavy drinking and acute alcoholism, and assassination by poisoning (advocated by Aristotle's nephew Callisthenes among others). The empire fractured within a year of his death among his senior generals (the *Diadochi*) and never reunified.

Vitruvius's De architectura IX, preface — written about 25 BCE — records that Archimedes saw water rise as he entered a bath, realised volume could be measured by displacement, and ran home shouting 'Eureka!' without dressing.

Plutarch's asp story (written 140 years later) has physical problems — three women dying within minutes from one cobra is implausible. Christoph Schaefer's 2010 reconstruction argues for a deliberately-prepared poison mixture shared between Cleopatra and her two attendants.

He threw a stone looking for a lost goat and heard pottery break. The cave contained seven 2,000-year-old leather scrolls — the start of the Dead Sea Scrolls discovery.

Seven women (Pampinea, Filomena, Neifile, Fiammetta, Elissa, Emilia, Lauretta) and three men (Panfilo, Filostrato, Dioneo) meet at Santa Maria Novella in summer 1348 and flee plague-stricken Florence for a country villa above Fiesole. Each day one of them is appointed 'king' or 'queen', proposes a theme, and the remaining nine each tell a tale on it. Ten × ten = 100 tales. The opening plague description is the most detailed contemporary eyewitness account of the 1348 Florentine outbreak.

The erasure campaign began around 1438 BCE, approximately twenty years into Thutmose III's solo reign. The timing fits an institutional motive — clearing the dynastic record for his son Amenhotep II — rather than personal revenge.

The Irish merchant Peter Dillon located the Boussole and Astrolabe wreckage on the southeast reef of Vanikoro in May 1827 — 39 years after the 1788 disappearance. He had been alerted by sword-guard trade items at Tikopia.

Husky liver contains a fatal dose of vitamin A. The Mawson-Mertz party ate the livers because they were the most calorie-dense dog parts. Mertz died on 8 January 1913. Mawson walked the last 160 km alone with the soles of his feet detaching.

Merian was 52, widowed, and supporting herself in Amsterdam as a botanical illustrator. She sailed with her younger daughter Dorothea Maria Graff and stayed two years.

Pepys wrote in Shelton's Tachygraphy, a shorthand system largely forgotten by the 18th century. The first decoded edition was published in 1825 by John Smith. The complete edition appeared 1970-1983.

All 115 colonists were gone. CROATOAN was carved on a post; CRO was carved on a nearby tree. White assumed they had moved to Croatoan Island but never confirmed. The Lost Colony's fate is unresolved.

The traditional foundation date is 21 April 753 BC — the day Romulus killed his twin Remus in a dispute about which hill to build the city on. The date was a Roman religious-political calculation, working backward from later dynastic chronologies; modern archaeology suggests continuous settlement on the Palatine hill from approximately the 8th century BC, broadly consistent with the date but with no specific evidence for the twin-wolf-fratricide narrative. 509 BC is the founding of the Roman Republic (the expulsion of the last king Tarquinius Superbus). 600 BC is roughly when the historical urban-Roman state becomes archaeologically visible.

Suetonius (Divus Julius 32) records the Latin 'Iacta alea est'. Plutarch gives the same phrase in Greek (Menander's anerriphtho kybos). The XIII Gemina legion crossed with him.

The Sushruta Samhita describes about 300 surgical procedures. The forehead-flap rhinoplasty — a paddle of forehead skin swung down to reconstruct a lost nose — was the one Joseph Carpue brought to London in 1794-1814.

Construction ran approximately 22 years, from 1632 to about 1653. About 20,000 workers and 1,000 elephants were employed. Mumtaz Mahal had died in childbirth in 1631; Shah Jahan was buried beside her in 1666.

Stomach analysis identified an 85 percent barley/oats porridge with flax and knotgrass seeds — substantial but ordinary, not a ritual feast. The Tollund Man was hanged in the late pre-Roman Iron Age, around 405-380 BCE.

The Viking Age homelands were the three modern Scandinavian countries, though the boundaries between them were not yet politically defined in the late 8th century. The Old Norse word *víkingr* derives from *vík* (bay/inlet) — a Viking was someone who set out *í víking*, 'on a bay-going expedition'. The term was a job description (raider/seafarer), not an ethnic or national label; most Scandinavians of the period were farmers who never went a-viking. The conventional Viking-Age boundary dates are 793 (the sack of the monastery at Lindisfarne) and 1066 (the failed Norwegian invasion of England at Stamford Bridge).

AMS radiocarbon dating at the University of Arizona produced 1404-1438 with 95 percent confidence, eliminating both the Roger Bacon (too early) and Edward Kelley forgery (too late) theories.

Wallace was on Ternate in the Maluku Spice Islands. Rereading Malthus during the fever, he saw natural selection in a few hours and posted the manuscript to Darwin, who had been refining the same theory privately for twenty years.

Zama was fought on 19 October 202 BCE. Scipio's parallel-lane infantry formation funnelled Hannibal's elephants harmlessly through the Roman line; trumpet noise drove half the elephants back to trample their own cavalry.

Octavian's fleet under his admiral Agrippa beat Antony and Cleopatra at Actium. Antony killed himself first, on the false rumour that Cleopatra was already dead; she followed him a few weeks later. Pompey had been dead for seventeen years by then — Caesar had defeated him at Pharsalus in 48 BC, and he'd been murdered in Egypt shortly after. Caesar himself had been assassinated thirteen years earlier on the Ides of March.

Alexander died in the palace at Babylon (modern Iraq) on 10 or 11 June 323 BC after a ten-day fever. The cause is still disputed — typhoid, West Nile, malaria, alcoholic complications, and slow poisoning have all had defenders. He never made it home; his body was hijacked by his general Ptolemy and brought to Alexandria, where it became a major tourist attraction for the next several centuries until the tomb was lost in late antiquity. He had personally burned Persepolis nine years earlier.

King Hiero II had commissioned a gold crown but suspected the goldsmith of substituting some silver. Archimedes realised in the bath that an object's volume could be measured by the water it displaces — and that comparing the displacement of the crown with that of a pure-gold reference of the same weight would reveal the fraud. The story comes from Vitruvius (writing about 250 years later) and may be embellished. The Eureka technique is now substantially recognised as a real Archimedean principle (the law of buoyancy), independently developed in his treatise *On Floating Bodies*. The mirror/burning-glass war machine is a separate (and probably apocryphal) story from the siege of Syracuse.

Justinian's 529 imperial edict prohibited pagans from teaching philosophy or law. Damascius — the last head of the Academy — closed the institution and led six other senior philosophers east to seek asylum at the Sasanian court of Khosrow I. They returned to Roman territory three years later under a clause of the 532 Treaty of Eternal Peace that guaranteed their legal protection. Theodosius I's 391 decree had earlier closed the pagan temples (the Serapeum at Alexandria was destroyed under it) but did not specifically close the Athenian schools.

Cleisthenes's reforms in 508/507 BC reorganised the Athenian citizen body into ten new tribes and introduced the lot-based council that ran daily business. Pericles in the mid-5th century pushed direct popular participation further. The system lasted about 180 years before Macedonian conquest in 322 BC suppressed it. Participation was restricted to adult male citizens — roughly 30,000–60,000 men out of a city population of perhaps 300,000 including women, slaves, and resident foreigners. Demosthenes was a 4th-century BC orator at the tail end of democratic Athens, not its founder. The Bronze Age date predates Greek writing entirely.

29 May 1453, after a 53-day siege. The last Byzantine emperor, Constantine XI Palaiologos, died fighting at the walls; his body was never reliably identified. The siege gun — built by the Hungarian engineer Orban — had a 27-foot bronze barrel and fired stone balls weighing 600 pounds. The 1204 sack was the Fourth Crusade's catastrophic detour; the Byzantines recovered the city in 1261. Manzikert (1071) was the earlier Seljuk Turkish victory that lost most of Anatolia. The 1683 Siege of Vienna was 230 years later, after the Ottomans had become a different kind of empire.

Cannae killed approximately 50,000–70,000 Romans in roughly four hours, including one of the two consuls and about 80 senators. The single-day death toll wasn't exceeded by a Western army until the first day of the Somme in July 1916, 2,132 years later. Hannibal's tactical formation — a deliberate convex bow in his centre that withdrew under Roman pressure while his African infantry on the wings closed in from both sides — is still studied at every military academy. Rome didn't surrender. Within fifteen years it had destroyed Carthage.

The snake-bite story comes from Plutarch (writing about 130 years later) and is the tradition that has dominated subsequent European literature and visual art. Modern medical scepticism notes that cobra venom usually kills slowly and painfully — not the quick dignified death the traditional story describes — and proposes alternatives (a fast-acting poison concealed in a hollow comb, suffocation, even Octavian-arranged murder). The basket of figs detail is in Plutarch and may be folklore. Cleopatra was 39. Her son Caesarion was executed by Octavian within weeks.

Eratosthenes knew that on the summer solstice, the sun was directly overhead at Syene (modern Aswan), because it lit the bottom of a deep well. At Alexandria on the same day, a vertical pole cast a shadow at an angle of about 7.2 degrees. Since 7.2° is one-fiftieth of a circle, the distance between Alexandria and Syene had to be one-fiftieth of the Earth's circumference. He knew the distance (about 5,000 stadia, by professional surveyors who measured it by counting camel paces). The arithmetic gave a circumference of approximately 250,000 stadia — about 40,000 km, within two percent of the modern value. He had no instruments more complex than a pole.

Polybius, the most reliable source, gives 37. They were probably North African forest elephants — a smaller subspecies than the Indian war elephant, now extinct, that the Carthaginians used in earlier wars. By the time Hannibal reached the Italian plains, only a handful were still alive. By the time of the Battle of Trebia later that winter, only one was left; Hannibal personally rode it. The 200-elephant figure belongs to Pyrrhus's much earlier Italian campaign of 280 BC.

Approximately 60 senators were in the conspiracy, although only a fraction were active in the actual stabbing in the Theatre of Pompey. The 23 wounds reported in the autopsy weren't all from the same person. Brutus and Cassius were the political organisers; the stabbing itself was a group act, with each conspirator expected to make a personal contribution. Caesar's body lay where it fell for some hours before being recovered. None of the assassins survived the resulting civil war; Brutus and Cassius died at Philippi in 42 BC.

Built under Ptolemy II Philadelphus around 280 BC at the entrance to Alexandria's harbour. Estimated height between 103 and 118 metres — the tallest human-built structure in the world for most of its existence. A series of medieval earthquakes (956, 1303, 1323 AD) progressively destroyed it. The Mamluk Sultan Qaitbay used its remaining stones to build a citadel on the same site in 1480; the Qaitbay Citadel still stands. The lighthouse design — multiple stepped tiers (square base, octagonal middle, cylindrical top) with a fire and reflector at the summit — set the template for the entire subsequent European lighthouse tradition.

79 AD has stuck since antiquity. The August date came from a corrupt manuscript reading of Pliny the Younger's letters and has been steadily eroded by archaeology: woollen cloaks on victim bodies, autumn-harvest material in shops, and most decisively a charcoal inscription dated 17 October found in House V.6 in 2018. An October eruption — about 24 October — is now consensus. Pliny the Elder died on the second day of the eruption while trying to mount a naval rescue from Misenum.

The Republic lasted from 509 BC to approximately 27 BC — about 482 years. The legendary trigger was the rape of Lucretia by Tarquin's son, which produced an aristocratic revolt under Lucius Junius Brutus that expelled the Tarquin dynasty. 753 BC was the traditional Roman foundation date for the city itself. 264 BC was the start of the First Punic War. 27 BC is the Augustan settlement that effectively ended the Republic.

Synesius was made Bishop of Ptolemais in 410 AD by the Patriarch Theophilus of Alexandria — the same Theophilus who had destroyed the Serapeum nineteen years earlier. He accepted only on the explicit condition that he could keep his wife, his philosophical views (he did not believe in the literal resurrection of the body), and his hunting. He governed the see for three years before dying of an unidentified illness around 413. Hypatia was murdered by an Alexandrian mob two years later, in 415.

The Antikythera mechanism uses about 35 interlocking bronze gears to model the motion of the sun, moon, and (probably) the five visible planets, with a complete eclipse-prediction system based on the Saros cycle. The shipwreck dates to roughly 60 BC; the mechanism was probably built around 100 BC, in the eastern Mediterranean Greek scientific tradition associated with Hipparchus of Rhodes. Nothing of comparable mechanical sophistication is known until medieval Islamic astronomical instruments more than a thousand years later. The original existence of such a device was so improbable that the academic mainstream took most of the 20th century to accept it.

Aristarchus's original treatise on heliocentrism is lost; the proposal survives only through a single passage in Archimedes' *Sand-Reckoner*. The Greek astronomical mainstream — Hipparchus and Ptolemy — rejected it because no stellar parallax was observable (it would not be measured until Bessel in 1838). The Stoic philosopher Cleanthes argued Aristarchus should be prosecuted for impiety. Copernicus revived the model in 1543 and cited Aristarchus by name in his preface.

Eudoxus's homocentric-sphere model was the first attempt to derive observed planetary motion from pure uniform circular motion. The pairs of coupled retrograde-loop spheres for each planet used the geometric figure-eight construction called the *hippopede* ('horse-fetter'). Aristotle later expanded the system to 55 spheres to account for the physical interaction between adjacent planetary systems. The model could not explain the observed apparent-brightness variations (Mars at opposition vs conjunction), and was eventually replaced by Hipparchian and Ptolemaic epicycles.

The Hipparchian catalogue contained approximately 850 stars, with positions in ecliptic coordinates accurate to about one degree and brightnesses on a 1-to-6 magnitude scale (the direct ancestor of the modern stellar magnitude system). The catalogue itself was lost; it survives substantially through inclusion in Ptolemy's *Almagest* (c. 150 AD), where Ptolemy substantially preserved Hipparchus's data with minor updates. A 2022 multispectral imaging project at St Catherine's Monastery in Sinai recovered fragments of the original Hipparchian Greek text from a palimpsest — the first direct recovery of any portion of the catalogue. Telescopes were 1,700 years in the future.

The seven senior philosophers under Damascius had spent about a year at Khusrau's court at Ctesiphon. They had found Sasanian court life culturally alienating — Zoroastrian state religion as hostile to Greek paganism as Christianity had been, court ceremonial requiring undignified obeisance, elite endogamous marriages offensive to Greek sensibility. They asked to leave. Khusrau agreed but insisted Justinian guarantee their safety in the 532 peace treaty — without it, their return would have exposed them to immediate prosecution. Damascius died at Emesa around 538; Simplicius continued Aristotelian commentary work at Carrhae for two more decades.

Petrarch had grown up in Avignon (his exiled Florentine father moved there in 1311) and had taken minor clerical orders in the Avignonese curia. He spent four decades writing both inside and against the papal court that funded his scholarly career. The phrase had been used by earlier authors (Marsilius of Padua in the 1320s) but Petrarch fixed it as the canonical European literary description — adopted by every subsequent historiographic tradition including the Protestant Reformation polemic of 150 years later. Dante did not use the phrase. Boccaccio wrote about the plague, not the papacy. Catherine pressed the same Roman-return position but in different language.

Hipparchus noticed that the stars had shifted about 2 degrees relative to the equinox points since the older Alexandrian observations. He was about 30 percent low on the rate but the discovery itself was the first detection of any systematic motion of the whole celestial sphere — caused, as we now know, by the Earth's axis wobbling like a top on a 26,000-year cycle. Aristarchus had been earlier (3rd century BC) and proposed heliocentrism — also correct, also ignored. Eratosthenes was the librarian. Ptolemy lived three centuries after Hipparchus and preserved most of Hipparchus's work in the *Almagest*.

Hippocrates of Cos (c. 460–375 BC) was the founder of the European medical tradition, born to a family of Asklepiad physicians at the Asklepieion of Cos. His Hippocratic Corpus — about 60 Greek medical treatises — defined European medical theory for two thousand years. The Hippocratic Oath is the most famous text. Hippocrates of Chios (c. 470–410 BC) was a mathematician of substantial original accomplishment: he wrote the first written *Elements of Geometry* (the lost predecessor of Euclid's *Elements*) and computed the first quadrature of a curved figure (the lune). They never met.

A new star — what we now call a Type Ia supernova, SN 1572 — appeared in Cassiopeia and remained visible for sixteen months. Aristotelian cosmology held that the celestial sphere above the moon was unchanging; a new star above the moon was, by the prevailing theory, impossible. Tycho's parallax measurements demonstrated that the star sat well beyond the moon, demolishing the Aristotelian unchanging-heavens doctrine on observational grounds. His pamphlet *De Nova Stella* (1573) was one of the foundational publications of European astronomy. The other answers describe imagined celestial phenomena rather than the actual 1572 event.

Cleopatra Selene II married Juba II of Mauretania around 25 BC. Both had been raised in the same Roman aristocratic household; Augustus gave them Mauretania as a client kingdom. Their capital, Iol, was renamed Caesarea (modern Cherchell, Algeria). Numidia had been Juba's father's kingdom but was annexed by Rome after the father's suicide in 46 BC. Cappadocia had its own Roman client dynasty. The Bosporan kingdom was a different Roman client kingdom around the Sea of Azov — Cleopatra Selene had nothing to do with it.