The Ptolemies: What They Built, and What They Wrote Down

Three centuries in which a Macedonian dynasty took a civilisation seven hundred years past its peak — and left the record that let us read it again.

1. The chain

Alexander died at Babylon in 323 BC and his generals divided the empire. Ptolemy son of Lagus took Egypt. What he took was not a great power.

Egypt had been in decline for seven centuries. The New Kingdom ended in 1069 BC and the country split between pharaohs at Tanis and high priests at Thebes. Libyan dynasties followed from 945. Nubia conquered Egypt in 747 and ruled it as the twenty-fifth dynasty. Assyria took Memphis in 671 and sacked Thebes in 663 so completely that the prophet Nahum used the ruin of Thebes as his image of total destruction. A native revival under the Saites from 664 lasted a hundred and forty years and ended with the Persian conquest of 525. Persia returned in 343. When Alexander arrived in 332 he was welcomed, because the alternative was Persia.

And the script was dying. Hieroglyphic writing had become the preserve of a shrinking priesthood; demotic served the administration; Greek was arriving. The knowledge of three thousand years was held by a caste that was contracting, in a script fewer people could read each generation.

This memo is about what happened next, and it makes one argument. The Ptolemies did not create Egyptian knowledge. They translated it, catalogued it, funded it and cut it into stone in three scripts — and that habit is the reason the Egyptian record was recoverable at all when the script finally died.

2. Ptolemy I, and the body

He was a soldier of the guard, a childhood companion of Alexander, and by 323 one of the most senior men in the army. He took the satrapy of Egypt and held it while the others destroyed each other over the rest.

Then he took the body. Alexander’s funeral cortege was bound for Macedon; Ptolemy intercepted it and diverted it to Memphis, and later to Alexandria. The other generals understood exactly what that was: possession of the corpse was a claim on the succession, and Perdiccas invaded Egypt to get it back and died in the attempt.

He took the title of king in 305 and the epithet Soter, saviour. And he did something no other successor did: he wrote a history of the campaigns himself. It is lost, but it is the principal source Arrian used four centuries later — so the general is also, at one remove, our record of Alexander.

2.1 Son of Lagus — or of Philip

Lagus is almost nothing but a patronymic. A Macedonian of some standing, not royal, and effectively nothing else about him survives. The name means hare. The dynasty is called the Lagids after him and that is close to the whole of his presence in the record.

There is an ancient tradition that he was not the father. Pausanias 1.6.2 reports that the Macedonians held Ptolemy to be the son of Philip II, only putatively of Lagus, and that his mother Arsinoe was already pregnant when Philip gave her in marriage. Curtius 9.8.22 carries the same, that some believed him born of Philip and that he was certainly the son of Philip’s concubine. The Suda repeats it.

If it were true he would be Alexander’s half-brother, and it would explain a good deal: why he alone among the successors took the richest satrapy without a serious fight, why he had the standing to seize the body and survive Perdiccas invading to recover it, and why a man of the bodyguard rather than a senior marshal ended holding Egypt.

Against it stands the strongest kind of silence. No contemporary says it. Ptolemy never claimed it — and he had every reason to, and he controlled his own history. He styled himself son of Lagus, and his successors kept the form. The two witnesses write four hundred years and more after the event, and both report it as what some say. And there is an obvious motive for such a story to exist: every successor manufactured a connection to Alexander, and a Lagid claim of Argead blood is precisely what a dynasty in that position would invent.

So the memo records the belief and not the fact. What can be stated is that the story was current, and current enough for Pausanias to give it as the Macedonian view.

One symmetry is worth marking, because it runs the length of this memo. The dynasty opens with a founder whose paternity was disputed and closes with a king whose paternity was disputed and denied in a published book — Lagus or Philip in 323, Caesar or not in 44. In both cases the question was the same one: whether the man was the son of a king. See Ptolemy XV: Cut From History, section 5.

3. Alexandria

Founded by Alexander in 331 on a strip between the sea and Lake Mareotis, laid out on a grid, and made the capital under Ptolemy I. The Heptastadion, a causeway seven stadia long, ran out to the island of Pharos and made two harbours out of one bay. The city had a Greek quarter, an Egyptian quarter and a Jewish quarter, and by the second century BC it was the largest city in the Mediterranean.

The Pharos, begun under Ptolemy I and finished under Ptolemy II, stood at the harbour mouth and was counted among the seven wonders. It survived until earthquakes brought it down in the fourteenth century. Its foundation blocks lie underwater off Fort Qaitbay and have been surveyed by divers.

4. The Mouseion and the Library

The Mouseion — a shrine of the Muses — was a research institution attached to the palace, with salaried scholars, funded by the crown, housed and fed at public expense. There is no earlier example of that arrangement anywhere. It is the ancestor of every endowed university department since.

The collection policy is recorded by Galen, and it is worth stating plainly because it is not what most accounts say. Books were seized from ships docking in the harbour, copied, and the copies returned to the owners. The originals were kept. Whether or not the detail is exact, the ambition it describes is documented elsewhere: the Library was trying to hold everything.

Callimachus then did the thing that makes a collection into a library. His Pinakes — ‘tables’ — ran to 120 books, arranged the holdings by subject and author, and recorded for each work its opening words and its length. It is the first library catalogue in the world. It is also lost.

5. What was done there

The output of one institution over roughly two centuries, and the list is not padded.

• Euclid, c. 300 BC. The Elements is compiled at Alexandria and remains the standard geometry of the West for more than two thousand years.
• Eratosthenes, librarian, c. 240 BC. Using the difference in the sun’s angle at Syene and Alexandria he calculates the circumference of the earth to within a few per cent of the true figure.
• Aristarchus of Samos. A heliocentric model, eighteen centuries before Copernicus. The work is lost; we know of it because Archimedes describes it in order to argue with it.
• Herophilus and Erasistratus, c. 250 BC. Human dissection is practised at Alexandria under royal licence. It is the only period in antiquity when it was permitted, and much of the anatomical vocabulary from it is still in use.
• Apollonius of Perga on conic sections; Hero and the mechanics; the grammarians who gave us the Homeric text.

One point about the funding, because it is the whole institutional argument. None of this was commercially useful. Measuring the earth had no application. A state paid for it anyway, for two hundred years, and the results outlasted the state by two millennia.

6. Translation as policy

Two projects, and between them they are why we have any continuous account of the ancient near east.

Manetho, an Egyptian priest, wrote the Aegyptiaca in Greek under Ptolemy I or II. It survives only in quotations by later writers. But the division of Egyptian history into thirty dynasties is his, and it is still the one every museum and textbook uses. An Egyptian priest, writing for a Macedonian king, in Greek, set the framework we still think in.

The Septuagint — the Hebrew scriptures translated into Greek at Alexandria under Ptolemy II. It is the larger of the two projects by a long way and it has section 7 to itself.

The policy behind both is the thing worth naming. The Ptolemies had the peoples they ruled write their own histories, in Greek, and put them in the Library.

7. The Bible in Greek

Of everything the Library produced, this is the one whose consequences are still running. The Hebrew scriptures were translated into Greek at Alexandria in the third century BC, beginning with the Pentateuch under Ptolemy II and continuing over the following century and a half.

7.1 What was unprecedented about it

Sacred texts were not translated. A cult’s scriptures belonged to its language and its priesthood, and that was general across the ancient world. There is no earlier example of a religious corpus being systematically rendered into a foreign tongue for readers outside the community. Manetho wrote Egyptian history for Greeks, but he wrote it himself and it was history. This was different: the sacred books of one people, in the language of another, held in a public library.

The traditional account — seventy-two elders sent from Jerusalem, completing the work in seventy-two days in separate cells and agreeing word for word — comes from the Letter of Aristeas, a Jewish composition of the second century BC written to defend the translation’s authority. It is a later apologia and this memo does not treat it as evidence for how the work was done. The name Septuagint, and its numeral LXX, come from that story.

What is attested is the translation. It is quoted from the second century BC, it survives in a continuous manuscript tradition, and its Greek shows the marks of working translators rather than of a single event.

7.2 Why it mattered immediately

By the third century BC a large Jewish population lived in Alexandria and across the Greek east, and for many of them Greek was the first language and Hebrew was not read at all. The translation was made because it was needed. Philo of Alexandria, writing in Greek in the first century AD, works from it throughout.

And it made the Hebrew scriptures readable by everyone else. For the first time a Greek speaker with no connection to Judaism could pick up the Jewish scriptures and read them.

7.3 What followed from it

The early Church used it. The New Testament writers quote the Greek far more often than they translate from the Hebrew, and where the two differ the quotation usually follows the Greek. Christianity moved through a Greek-speaking world with a Greek Bible already in it, made three centuries earlier, at a Ptolemaic library, for entirely different reasons.

Two consequences are worth setting out because they are still live.

The canon. The Septuagint carried books that the later Hebrew canon did not — Tobit, Judith, Wisdom, Sirach, Maccabees and others. The difference between the Catholic and Orthodox Old Testament and the Protestant one descends directly from that, because the Reformers went back to the Hebrew and the older churches had kept the Greek.

The chronology. The Septuagint’s figures for the generations from Adam to Abraham total 3,394 years against the Masoretic Text’s 2,008 — a divergence of 1,386 years in the same genealogies. On the Flood alone it is roughly 3298 BC against 2348. The divergence is set out on The Line from Noah to Jesus, and it means that the date of creation depends on which Alexandrian manuscript tradition you are reading.

7.4 A correction the twentieth century supplied

For most of the last two thousand years the Septuagint’s departures from the Hebrew were treated as translators’ errors. The Dead Sea Scrolls showed that some of them are not. Among the biblical manuscripts from Qumran are Hebrew texts whose readings agree with the Septuagint against the Masoretic Text — which means those readings existed in Hebrew, and the translators were rendering a text that has since been lost rather than getting it wrong.

That is a material finding and it changes the standing of the translation. The Septuagint is not only a version of the Hebrew Bible. In places it is a witness to a Hebrew text older than the one that survived.

7.5 What it says about the policy

The Library’s programme was to collect everything and to have subject peoples set down their own record in Greek. Manetho did it for Egypt and gave us the dynasties. The Jewish community of Alexandria did it for the Hebrew scriptures, and gave the Greek and then the Roman world a book it would otherwise never have read.

Neither outcome was the point. The Ptolemies were building a collection and legitimising a foreign dynasty. What they actually did was carry two civilisations’ records across a language barrier at the last moment when the people who held them could still be asked.

8. The temples

They also built, and they built Egyptian.

Edfu, the temple of Horus, begun in 237 BC under Ptolemy III and completed 180 years later. It is the best-preserved temple in Egypt — roof intact, walls complete, inscriptions unweathered, because it was buried in sand until the nineteenth century. The best-preserved Egyptian temple in the world is Ptolemaic.

Dendera, the temple of Hathor, whose south exterior wall carries Cleopatra and Ptolemy XV at monumental scale. Philae, the temple of Isis, moved stone by stone in the 1970s to escape the Aswan flooding. Kom Ombo, doubled for two gods. Esna, whose ceiling has been cleaned in recent years to reveal colour.

None of this is Greek architecture. They built in the Egyptian manner, with Egyptian iconography, in hieroglyphs — and they put themselves in it, in Egyptian dress, making Egyptian offerings. A Macedonian dynasty spent three centuries maintaining a religious tradition that was not its own, at enormous expense.

9. Kings as priests, and the decrees

The mechanism was the priestly synod. The Egyptian priesthoods met, voted honours to the king, and had the decree cut in stone and set up in every temple of the first rank — in hieroglyphic, in demotic, and in Greek.

• Canopus, 238 BC — under Ptolemy III. Among other honours it orders a sixth epagomenal day every fourth year. The priesthood did not adopt it and the reform lapsed. Two centuries later Caesar took the same reform and made it work, and it is the calendar in use now — set out in Sacred Time, section 8.
• Raphia, 217 BC — recording the victory over Antiochus III, in which Egyptian troops were armed and trained in the Macedonian manner for the first time.
• Rosetta, 196 BC — for Ptolemy V, and the most consequential object in the history of scholarship.

The Rosetta Stone is a routine document. It is a tax and honours decree of no particular importance, one of many, and that is exactly why it matters: the trilingual habit was so ordinary that an unremarkable decree carried the key to a dead script. Hieroglyphic had been unreadable for fourteen centuries when Champollion read it in 1822. The Egyptian record — three thousand years of it — was reopened by a Ptolemaic priestly committee doing paperwork.

10. The challenges

None of the above was done from a position of security.

• Six Syrian wars against the Seleucids across a century and a half. Ptolemy III reached Babylon; Ptolemy V lost the Levant at Panium in 200–198, and Judaea passed from Ptolemaic to Seleucid rule, from which the events of the Maccabean books follow.
• The revolt of Upper Egypt, 206–186 BC. Native pharaohs Horwennefer and Ankhwennefer held Thebes and the south for twenty years. The dynasty lost half its country and took two decades to recover it. Raphia is usually given as the cause: having trained Egyptians to fight in the Macedonian manner, the crown discovered they could.
• The dynasty turning on itself. Ptolemy VIII, from 145 BC, is the reign in which it goes wrong — and the expulsions under him scattered the scholars of Alexandria across the Greek world. Aristarchus of Samothrace, the head librarian, fled to Cyprus and died there.
• Debasement. The silver coinage is progressively reduced through the second and first centuries.

The scholarly loss under Ptolemy VIII is worth pausing on, because it is not the fire people remember. The Library lost its people before it lost its books, and an institution without scholars stops copying. Papyrus perishes in about two centuries unless somebody recopies it.

11. The Day of Eleusis, 168 BC

Antiochus IV invaded Egypt and had all but taken it. A Roman embassy under Gaius Popillius Laenas met him in the suburb of Eleusis outside Alexandria and handed him the Senate’s decree ordering him to withdraw. Antiochus said he would consult his advisers. Popillius drew a circle in the sand around him with his staff and told him to answer before he stepped out of it. Antiochus withdrew.

Rome had no army in Egypt and did not need one. From that day Egypt was a Roman client, a hundred and thirty-eight years before it became a province. Everything after 168 — the succession disputes settled at Rome, the will of Ptolemy Alexander, Caesar in the palace quarter, Antony and the Donations — happens inside a relationship established by an old man with a stick.

12. What Rome inherited

Alexandria fell in 30 BC. Cleopatra died, Ptolemy XV was killed on Octavian’s order — the subject of Ptolemy XV: Cut From History — and Egypt became the personal property of the emperor, governed by a prefect, with no senator permitted to enter it without leave.

But the institution did not stop. Alexandria remained the scientific centre of the Mediterranean for four more centuries under Roman rule. Claudius Ptolemaeus — no relation to the dynasty — wrote the Almagest and the Geographia there in the second century AD. Those two books governed astronomy and geography until the sixteenth century. Galen studied there. Diophantus worked there.

So the transfer is not a handover at a date. Egypt accumulated the knowledge over three millennia; a Macedonian dynasty institutionalised it; Rome inherited the institution and kept paying for it. The break, when it comes, comes later and comes slowly — the Brucheion quarter destroyed under Aurelian in AD 272, the Serapeum in 391 — and it is a story of defunding and failure to recopy rather than of a single fire. That is a memo of its own and this one does not attempt it.

13. The relics

Three of the twelve entries are absences, and they are the ones that matter most. The Library has not been located, its catalogue does not survive, and the body that founded the city’s claim to legitimacy has been lost. What survives in quantity is what was cut in stone or thrown in a rubbish tip.

14. What the evidence supports

What it supports. That Ptolemy took Egypt in 323 and diverted Alexander’s body to it. That an endowed research institution existed at Alexandria with salaried scholars, and that Euclid, Eratosthenes, Aristarchus, Herophilus and Apollonius worked in that setting. That Manetho wrote Egyptian history in Greek and that our dynastic scheme is his. That the Hebrew scriptures were translated into Greek at Alexandria in the third century BC. That the dynasty built and decorated major Egyptian temples in the Egyptian manner over three centuries. And that its priestly synods issued trilingual decrees, three of which survive on stone.

What it does not support. Any figure for the size of the Library — the numbers in the sources range from 40,000 to 700,000 and none is contemporary. The detail of the ships policy, which rests on Galen alone. The date and manner of the Library’s end, which the sources do not agree on. And the Letter of Aristeas, which is a later composition whatever the translation behind it.

The finding. This dynasty is the best-attested of the ancient world by a wide margin — papyri in tens of thousands, decrees in three scripts, temples standing to their roofs, coinage in quantity. And the reason is a habit: they wrote things down, in more than one language, and cut them in stone.

Set that against The Herod Question, where a king built on a comparable scale and left no dedicatory inscription that survives on any of it. The two cases are seventy years apart in the same eastern Mediterranean. The difference is not wealth, ambition or engineering. It is whether a ruler thought his name belonged on the work — and the consequence, two thousand years later, is that we can read one of them and are still arguing about the other.

15. Sources

Reference codes read source.work.passage and resolve on the Master Source Register.

1. The paternity of Ptolemy I — Pausanias 1.6.2 and Curtius 9.8.22 for the tradition that he was the son of Philip II by Arsinoe, married to Lagus while already pregnant; the Suda repeats it. No contemporary source carries it, and Ptolemy never claimed it, styling himself son of Lagus throughout. Both witnesses write four centuries or more after the event and both report it as what some say. The memo records the belief and not the fact.
2. The succession and the body — Diodorus Siculus 18.26–28 for the diversion of the funeral cortege; Arrian, Events after Alexander; Pausanias 1.6.3. Ptolemy’s own history is lost and reaches us through Arrian’s Anabasis, which names him as a principal source.
3. The Mouseion and the Library — Strabo 17.1.8 for the Mouseion attached to the palace; Galen, Commentary on Hippocrates’ Epidemics III, for the ships policy. Galen alone carries that detail and he writes four centuries later. The size of the collection is given variously from 40,000 to 700,000 and no figure is contemporary; this memo gives none.
4. Callimachus and the Pinakes — surviving in fragments; Pfeiffer’s edition is the standard. The 120-book figure comes from the Suda.
5. Eratosthenes — the measurement is described by Cleomedes, On the Circular Motions 1.7. The accuracy depends on the length of the stade, which is disputed; the memo says ‘within a few per cent’ and does not give a figure.
6. Aristarchus — Archimedes, The Sand Reckoner, which sets out the heliocentric model in order to argue against it. The original is lost and this is the only substantial witness.
7. Herophilus and Erasistratus — Celsus, De Medicina, preface, and Galen. Their own works are lost. The claim that dissection was licensed rests on hostile later testimony and is not independently attested.
8. Manetho — surviving only in quotation, principally by Josephus (Against Apion 1) and the Christian chronographers Africanus and Eusebius. The dynastic scheme in universal use descends from a lost book known through its opponents.
9. The Septuagint — the Letter of Aristeas for the traditional account, which is a second-century BC composition and is not treated here as evidence for how the translation was made. The translation is attested by quotation from the second century BC and by a continuous manuscript tradition. Philo works from it throughout. On the New Testament’s preference for the Greek, the standard collections of Old Testament citations. On the Qumran evidence: biblical manuscripts from Cave 4 carry Hebrew readings agreeing with the Septuagint against the Masoretic Text — material evidence that some divergences reflect a lost Hebrew Vorlage rather than translation error. The chronological divergence of 1,386 years from Adam to Abraham is set out with its figures on The Line from Noah to Jesus.
10. The decrees — Canopus, OGIS 56; Raphia; Rosetta, BM EA24. All three survive on stone in three scripts and are the memo’s strongest evidence.
11. The revolt of Upper Egypt — the native pharaohs Horwennefer and Ankhwennefer are attested in demotic documents and dated by regnal year, independent of the Greek narrative sources.
12. The Day of Eleusis — Polybius 29.27, who is close to the event; Livy 45.12. Polybius is the primary and Livy depends on him, so this is nearer one channel than two.
13. Under Rome — Claudius Ptolemaeus, Almagest and Geographia, both surviving. The Almagest reached the West through Arabic, and its familiar name is Arabic.
14. Verification register. The following are carried as reported and are not settled: the ships policy (Galen alone); the licensing of human dissection; any figure for the Library’s size; the date and manner of the Library’s end; the accuracy of Eratosthenes’s result, which turns on the stade; and the regnal dates of the later Ptolemies, which are disputed in detail.
15. Not consulted for this memo — G. Hölbl, A History of the Ptolemaic Empire, and the papyrological corpora. Much of the above reaches this memo through general treatments at second hand.