Ptolemy I in the context of "Lagus"

The Ptolemaic dynasty (/ˌtɒlɪˈmeɪ.ɪk/; Ancient Greek: Πτολεμαῖοι, Ptolemaioi), also known as the Lagid dynasty (Λαγίδαι, Lagidai; after Ptolemy I's father, Lagus), was a Macedonian Greek royal house which ruled the Ptolemaic Kingdom in Ancient Egypt during the Hellenistic period. Reigning for 275 years, the Ptolemaic was the longest and last dynasty of ancient Egypt from 305 BC until its incorporation into the Roman Republic in 30 BC.

Ptolemy, a general and one of the somatophylakes (bodyguard companions) of Alexander the Great, was appointed satrap of Egypt after Alexander's death in 323 BC. In 305 BC he declared himself Pharaoh Ptolemy I, later known as Sōter "Saviour". The Egyptians soon accepted the Ptolemies as the successors to the pharaohs of independent Egypt. The new dynasty showed respect to local traditions and adopted the Egyptian titles and iconography, while also preserving their own Greek language and culture. The Ptolemaic period was marked by the intense interactions and blending of the Greek and Egyptian cultures. Under the Ptolemies, Hellenistic religion was largely shaped by religious syncretism and imperial cult. Elements of Greek education became widespread in urban spaces, culminating in the foundation of the Mouseion (including the Library of Alexandria) and the Serapeum. During the Hellenistic period, the city of Alexandria, founded by Alexander the Great, would gradually surpass Athens as the intellectual centre of the Mediterranean world.

Ptolemy XII Neos Dionysus (Ancient Greek: Πτολεμαῖος Νέος Διόνυσος, romanized: Ptolemaios Neos Dionysos, lit. 'Ptolemy the new Dionysus' c. 117 – 51 BC) was a king of the Ptolemaic Kingdom of Egypt who ruled from 80 to 58 BC and then again from 55 BC until his death in 51 BC. He was commonly known as Auletes (Αὐλητής, "the Flautist"), referring to his love of playing the flute in Dionysian festivals. A member of the Ptolemaic dynasty, he was a descendant of its founder Ptolemy I, a Macedonian Greek general and companion of Alexander the Great.

Ptolemy XII was an illegitimate son of Ptolemy IX by an uncertain mother. In 116 BC, Ptolemy IX became co-regent with his mother, Cleopatra III. However, due to a civil war against his mother and his brother, Ptolemy X, he was exiled in 107 BC. Cleopatra III sent her grandsons to Kos in 103 BC. They were captured by Mithridates VI of Pontus probably in 88 BC. After the killing of his cousin Ptolemy XI, Ptolemy XII was recalled from Pontus and proclaimed pharaoh, while his brother, also named Ptolemy, was installed as king of Cyprus.

Ptolemy II Philadelphus (Ancient Greek: Πτολεμαῖος Φιλάδελφος, Ptolemaîos Philádelphos, "Ptolemy, sibling-lover"; 309 – 28 January 246 BC) was the pharaoh and basileus of the Ptolemaic Kingdom from 284 to 246 BC. He was the son of Ptolemy I, the Macedonian general of Alexander the Great who founded the Ptolemaic Kingdom after the death of Alexander, and Queen Berenice I, originally from Macedon.

During Ptolemy II's reign, the material and literary splendour of the Alexandrian court was at its height. He promoted the Museum and Library of Alexandria. In addition to Egypt, Ptolemy's empire encompassed much of the Aegean and Levant. He pursued an aggressive and expansionist foreign policy with mixed success. From 275 to 271 BC, he led the Ptolemaic Kingdom against the rival Seleucid Empire in the First Syrian War and extended Ptolemaic power into Cilicia and Caria, but lost control of Cyrenaica after the defection of his half-brother Magas. In the Chremonidean War (c. 267–261 BC), Ptolemy confronted Antigonid Macedonia for control of the Aegean and suffered serious setbacks. This was followed by a Second Syrian War (260–253 BC) against the Seleucid empire, in which many of the gains from the first war were lost.

Magas of Cyrene (Ancient Greek: Μάγας ὁ Κυρηναῖος; born before 317 BC – 250 BC, ruled 276 BC – 250 BC) was a Greek King of Cyrenaica. Through his mother’s second marriage to Ptolemy I he became a member of the Ptolemaic dynasty. He managed to wrest independence for Cyrenaica (in modern Libya) from the Greek Ptolemaic dynasty of Ancient Egypt, and became King of Cyrenaica from 276 BC to 250 BC.