Cleopatra VII Philopator was the last active ruler of the Ptolemaic Kingdom of Egypt, nominally survived as pharaoh by her son Caesarion. She was also a diplomat, naval commander, polyglot and medical author. As a member of the Ptolemaic dynasty, she was a descendant of its founder, Ptolemy I Soter, a Macedonian Greek general and companion of Alexander the Great. After the death of Cleoptra, Egypt became a province of the Roman Empire, marking the end oft he Hellenistic period that had lasted since the reign of Alexander. Her native language was Koine Greek and she was the first Ptolemaic ruler to learn the Egyptian language.