August 23. August 23 is the 235th day of the year (236th in leap years) in the Gregorian calendar; 130 days remain until the end of the year. Events Pre-1600 30 BC ??? After the successful invasion of Egypt, Octavian executes Marcus Antonius Antyllus, the eldest son of Mark Antony, and Caesarion, the last king of the Ptolemaic dynasty of Egypt and only child of Julius Caesar and Cleopatra. 79 ??? Mount Vesuvius begins stirring, on the feast day of Vulcan, the Roman god of fire. 476 ??? Odoacer, chieftain of the Germanic tribes (Herulic ??? Scirian foederati), is proclaimed rex Italiae ("King of Italy") by his troops. 1244 ??? Siege of Jerusalem: The city's citadel, the Tower of David, surrenders to the Khwarazmiyya. 1268 ??? The Battle of Tagliacozzo marks the fall of the Hohenstaufen family from the Imperial and Sicilian thrones, and leading to the new chapter...