Three centuries between Alexander’s death and the fall of Alexandria — the dynasty, the Library, the temples, the wars, and what Rome inherited.
The Ptolemies: What They Built, and What They Wrote Down — the memo →
What this page is for. Egypt was already seven centuries past its peak when Ptolemy took it — the New Kingdom had ended in 1069 BC, and Nubian, Assyrian and Persian rule had followed. Its script was dying. What the dynasty then did — the Mouseion, the collection policy, Manetho, the Septuagint, the trilingual decrees — carried that knowledge forward three hundred years and, through the Rosetta Stone, gave it back to us in 1822.
And the institution outlived the dynasty. Alexandria kept working under Rome for four hundred more years. Claudius Ptolemaeus wrote the Almagest there in the second century AD, and it governed astronomy until Copernicus. The break is not 30 BC.
How the grading reads. one amber dot: a single channel carries it. two green: two independent sources cross. three green: a contemporary inscription, coin or other object. Twelve of the thirty-one entries carry material evidence — a far better rate than any other register on this site, because this dynasty inscribed its decrees in stone, in three scripts.
| № | Date | Lane | Event | Att. |
|---|---|---|---|---|
| 1 | 323 BC | DYNASTY | Alexander dies at Babylon. The empire is divided among the generals. Ptolemy son of Lagus takes Egypt as satrap. | |
| 2 | 321 BC | DYNASTY | Ptolemy takes the body. He intercepts Alexander’s funeral cortege bound for Macedon and diverts it to Memphis, later to Alexandria. Possession of the body is a claim to the succession, and the other generals understood it as one. | |
| 3 | c. 320 BC | KNOWLEDGE | Ptolemy writes his own history. A general who becomes a source. His account of the campaigns is lost but is the principal thing Arrian used four centuries later. | |
| 4 | 305 BC | DYNASTY | Ptolemy I takes the title of king. Soter, the saviour. The satrapy becomes a kingdom. | |
| 5 | c. 300 BC | KNOWLEDGE | The Mouseion founded. A research institution with salaried scholars, funded by the crown, attached to the palace. There is no earlier example of the arrangement. | |
| 6 | c. 300 BC | KNOWLEDGE | Euclid at Alexandria. The Elements is compiled here. It remains the standard geometry textbook of the West for more than two thousand years. | |
| 7 | c. 297 BC | WORKS | The Pharos begun. Under Ptolemy I, completed under Ptolemy II. One of the seven wonders. Its foundation blocks lie underwater off Fort Qaitbay and have been surveyed. | |
| 8 | 285 BC | DYNASTY | Ptolemy II Philadelphus. The reign in which the Library, the translation programme and the ruler cult all take their mature form. | |
| 9 | c. 280 BC | KNOWLEDGE | Manetho writes Egypt in Greek. An Egyptian priest composes the Aegyptiaca for the new rulers. The division of Egyptian history into thirty dynasties is his, and it is still the one in use. | |
| 10 | c. 270 BC | KNOWLEDGE | Callimachus and the Pinakes. A catalogue of the Library in 120 books, arranged by subject and author. The first library catalogue in the world. | |
| 11 | c. 250 BC | KNOWLEDGE | The Septuagint. The Hebrew scriptures translated into Greek at Alexandria. It becomes the Bible of the early Church, and its chronology differs from the Masoretic by 1,386 years. | |
| 12 | c. 250 BC | KNOWLEDGE | Herophilus and Erasistratus. Human dissection is practised at Alexandria. It is the only period in antiquity when it was permitted, and the anatomical vocabulary from it is still in use. | |
| 13 | c. 240 BC | KNOWLEDGE | Eratosthenes measures the earth. Librarian of Alexandria. Using the sun’s angle at Syene and Alexandria he calculates the earth’s circumference to within a few per cent of the true figure. | |
| 14 | c. 240 BC | KNOWLEDGE | Aristarchus puts the sun at the centre. A heliocentric model, eighteen centuries before Copernicus. The work is lost and survives only because Archimedes describes it. | |
| 15 | 238 BC | WORKS | The Canopus Decree. A priestly synod under Ptolemy III orders a sixth epagomenal day every fourth year. The priesthood does not adopt it. Two centuries later Caesar takes the same reform and makes it work. Trilingual, on stone. | |
| 16 | 237 BC | WORKS | Edfu begun. The temple of Horus, built over 180 years. It is the best-preserved temple in Egypt, and it is Ptolemaic. | |
| 17 | 246–241 BC | WARS | The Third Syrian War. Ptolemy III campaigns as far as Babylon. The dynasty is at its greatest extent. | |
| 18 | 217 BC | WARS | Raphia. Ptolemy IV defeats Antiochus III. Egyptian troops are armed and trained in the Macedonian manner for the first time, and the decree recording the victory is trilingual. | |
| 19 | 206–186 BC | WARS | The revolt of Upper Egypt. Native pharaohs Horwennefer and Ankhwennefer hold Thebes and the south for twenty years. The dynasty loses half its country and takes two decades to recover it. | |
| 20 | 196 BC | WORKS | THE ROSETTA STONE. A priestly decree for Ptolemy V, cut in hieroglyphic, demotic and Greek. It is the key that reopened the Egyptian record — the script had been unreadable for fourteen centuries when Champollion read it in 1822. | |
| 21 | 200–198 BC | WARS | Coele-Syria lost. Antiochus III takes the Levant at Panium. Judaea passes from Ptolemaic to Seleucid rule, and the events of the Maccabean books follow from it. | |
| 22 | 168 BC | ROME | THE DAY OF ELEUSIS. Popillius Laenas draws a circle in the sand around Antiochus IV outside Alexandria and demands his answer before he steps out of it. Antiochus withdraws. Egypt is a Roman client from that day, a hundred and thirty-eight years before it is a province. | |
| 23 | 145–116 BC | DYNASTY | Ptolemy VIII. The reign in which the dynasty turns on itself. Josephus and the later sources record the murder of his own son and the dismemberment; scholars persecuted and expelled from Alexandria. | |
| 24 | c. 145 BC | KNOWLEDGE | The scholars scatter. The expulsions under Ptolemy VIII disperse Alexandrian scholarship across the Greek world. Some of what the Library held travels with them; what stays begins to be lost. | |
| 25 | 116–80 BC | DYNASTY | Dynastic civil war. Cleopatra III against her sons; Ptolemy IX and X alternate on the throne. The coinage is debased through the period. | |
| 26 | 80 BC | ROME | The will of Ptolemy Alexander. Rome claims Egypt was bequeathed to it. The claim is disputed then and now, but it is never withdrawn. | |
| 27 | 51 BC | DYNASTY | Cleopatra VII accedes. With her brother Ptolemy XIII. The last of the line to rule as a Ptolemy in the old sense. | |
| 28 | 48 BC | ROME | Caesar in Alexandria. Pompey is murdered at the landing. Caesar is besieged in the palace quarter through the winter. Whatever burned in the harbour that year, the Library’s losses are debated and no source settles them. | |
| 29 | 47 BC | DYNASTY | Ptolemy XV born. Caesarion. The last Ptolemy. | |
| 30 | 30 BC | ROME | ALEXANDRIA FALLS. Cleopatra dies; Ptolemy XV is killed on Octavian’s order. Egypt becomes the personal property of the emperor, governed by a prefect, and no senator may enter without permission. | |
| 31 | AD 150 | KNOWLEDGE | The work continues under Rome. Claudius Ptolemaeus writes the Almagest and the Geographia at Alexandria, under Roman rule. They govern astronomy and geography until the sixteenth century. The institution outlives the dynasty by four hundred years. |