For other uses, see number 23.

Centuries: 1st century BC - 1st century - 2nd century

Decades: 20s BC 10s BC 0s BC 0s 10s - 20s - 30s 40s 50s 60s 70s

Years: 18 19 20 21 22 - 23 - 24 25 26 27 28

---

Events

• 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.
• Liu Xuan, a descendant of the Han Dynasty royal family and leader of insurgents against the Xin Dynasty, proclaims himself emperor against Wang Mang.
• Tiberius lost his son Julius Caesar Drusus, and from then on seems to have lost interest in the Empire and occupied himself with pleasure.
• Aelius Sejanus begins to dominate the Roman Senate, after the death of Drusus Julius Caesar.
• Gaius Asinius Pollio, Gaius Antistius Vetus become consuls

Births

• Pliny the Elder, Roman scientist and writer

Deaths

• Drusus Julius Caesar, son of the Emperor Tiberius, poisoned
• October 6 - Wang Mang, "usurper" of the throne of the Han Dynasty and Emperor of the Xin Dynasty

af:23 ca:23 da:23 de:23 es:23 eo:23 eu:23 fr:23 hr:23 it:23 lb:23 nl:23 no:23 pl:23 ro:23 ru:23 sl:23 sv:23 uk:23 zh:23年