The Ptolemaic dynasty, (Ancient Greek: Πτολεμαῖοι, sometimes also known as the Lagids or Lagides, Ancient Greek: Λαγίδαι, from the name of Ptolemy I's father, Lagus) was a Macedonian Greek royal family which ruled the Ptolemaic Empire in Egypt during the Hellenistic period. Their rule lasted for 275 years, from 305 BC to 30 BC. They were the last dynasty of ancient Egypt.

Ptolemy, one of the six somatophylakes (bodyguards) who served as Alexander the Great's generals and deputies, was appointed satrap of Egypt after Alexander's death in 323 BC. In 305 BC, he declared himself King Ptolemy I, later known as "Soter" (saviour). The Egyptians soon accepted the Ptolemies as the successors to the pharaohs of independent Egypt. Ptolemy's family ruled Egypt until the Roman conquest of 30 BC.

All the male rulers of the dynasty took the name Ptolemy. Ptolemaic queens, some of whom were the sisters of their husbands, were usually called Cleopatra, Arsinoe or Berenice. The most famous member of the line was the last queen, Cleopatra VII, known for her role in the Roman political battles between Julius Caesar and Pompey, and later between Octavian and Mark Antony. Her apparent suicide at the conquest by Rome marked the end of Ptolemaic rule in Egypt.

Cleopatra VII Philopator (Ancient Greek: Κλεοπάτρα Φιλοπάτωρ; Late 69 B.C.E. – August 12, 30 B.C.E.), known to history as Cleopatra, was the last pharaoh of Ancient Egypt.

She was a member of the Ptolemaic dynasty, a family of Greek origin that ruled Egypt after Alexander the Great's death during the Hellenistic period. The Ptolemies, throughout their dynasty, spoke Greek and refused to speak Egyptian, which is the reason that Greek as well as Egyptian languages were used on official court documents such as the Rosetta Stone. By contrast, Cleopatra did learn to speak Egyptian and represented herself as the reincarnation of an Egyptian goddess, Isis.

Cleopatra originally ruled jointly with her father Ptolemy XII Auletes and later with her brothers, Ptolemy XIII and Ptolemy XIV, whom she married as per Egyptian custom, but eventually she became sole ruler. As pharaoh, she consummated a liaison with Julius Caesar that solidified her grip on the throne. She later elevated her son with Caesar, Caesarion, to co-ruler in name.

Stacy Madeleine Schiff (born October 26, 1961) is a Pulitzer Prize-winning American nonfiction author and guest columnist for The New York Times.

Schiff, born in Adams, Massachusetts, is a graduate of Phillips Andover Academy preparatory school, and earned her B.A. degree from Williams College in 1982. She was a Senior Editor at Simon & Schuster until 1990. Her essays and articles have appeared in, among other places, The New Yorker, The New York Times and The Times Literary Supplement. She is a frequent contributor to the New York Times Book Review, which noted that she has been "regularly praised for both her meticulous scholarship and her witty style." (October 24, 2008)

Schiff has received fellowships from the John Simon Guggenheim Memorial Foundation and the National Endowment for the Humanities. and was a Director's Fellow at the New York Public Library's Center for Scholars and Writers.

Schiff won the 2000 Pulitzer Prize for Vera, her biography of Vera Nabokov, wife and muse of Lolita and Pale Fire author Vladimir Nabokov. She was also a finalist for the 1995 Pulitzer Prize for Saint-Exupéry: A Biography of Antoine de Saint Exupéry.