Cleopatra was 39 years old when she died in August 30 BC. The exact date of her death is believed to be either August 10 or 12. She was the last ruler of the Ptolemaic Kingdom of Egypt, and her death marked the end of the Hellenistic period and the beginning of Roman Egypt under Roman rule. Cleopatra's death is famously believed to have been a suicide, possibly by poison or an asp bite, although the exact cause remains debated among scholars.