25 BC

By place

Roman empire

• Imperator Caesar Augustus becomes Consul for the ninth time. His partner is Marcus Junius Silanus.
• The temple to Neptune on the Circus Flaminius is built.
• Estimation: Rome, capital of the Roman Empire becomes the largest city in the world, taking the lead from Chang'an, capital of China.
• Galatia becomes a Roman province after the death of its king. The Roman troops stationed there are relocated to Egypt.
• The Roman colony of Emerita Augusta is founded.

  China

• The government gives its tributary states 20,000 rolls of silk cloth and about 20,000 pounds of silk floss.