  Shown within Portugal | |
| Location | Portugal |
|---|---|
| Region | Lisbon metropolitan area |
| Coordinates | 38°42′44″N 9°08′02″W / 38.7122204°N 9.1339731°W |
Municipium Cives Romanorum Felicitas Julia Olisipo (in Latin: Olisippo or Ulyssippo ; in Greek: Ὀλισσιπών, Olissipṓn, or Ὀλισσιπόνα, Olissipóna) was the ancient name of modern-day Lisbon while it was part of the Roman Empire.