This article is about the year AD 23. For other uses, see 23 , 23 , or 23 . Year 23 was a common year starting on Friday (link will display the full calendar) of the Julian calendar. Events Roman Empire · Greek geographer Strabo publishes Geography, a work covering the world known to the Romans and Greeks at the time of Emperor Augustus - it is the only such book to survive from the ancient world. · Tiberius' son Julius Caesar Drusus dies. From that point forward, he seems to lose interest in the Empire and occupies himself with the pursuit of pleasure. · Lucius Aelius Sejanus begins to dominate the Roman Senate and Tiberius, after the death of Julius Caesar Drusus. · Gaius Asinius Pollio and Gaius Antistius Vetus become consuls. Asia · Liu Xuan, a descendant of the Han Dynasty royal family and leader of insurgents against the Xin D