How long did the Ptolemaic dynasty rule Egypt?

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Ptolemaic sculpture — Ptolemaic dynasty Head of a queen, marble sculpture possibly made in Egypt, Ptolemaic period (305–30 bce); in the Brooklyn Museum, New York. 14 × 12 × 11.5 cm.

The Ptolemaic dynasty ruled Egypt for 275 years. The dynasty was founded by Ptolemy I Soter, who assumed the kingship on November 7, 305 BCE, and the period of their rule concluded with the death of Cleopatra VII on August 12, 30 BCE.12