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|Millennium:||1st millennium BC|
|448 BC by topic|
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Year 448 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Coritinesanus and Caeliomontanus (or, less frequently, year 306 Ab urbe condita). The denomination 448 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- Pericles leads the Athenian army against Delphi to restore the sanctuary of the oracle of Delphi to Phocis.
- The Athenians begin constructing the middle component of the Long Walls from their city to the port city of Piraeus.
- Following the co-optation of two patricians to the office of Tribune of the Plebs, the tribune Lucius Trebonius Asper introduces the Lex Trebonia, a law forbidding tribunes from co-opting their colleagues in the future.