Mare Nostrum: Why the Romans Called the Mediterranean "Our Sea"

Mare Nostrum—"Our Sea." The phrase captures the moment Rome turned an ocean into a domestic lake.

The Historical Arc

• 264–146 BCE (Punic Wars): Rome destroys Carthage, gains Sicily, Sardinia, Corsica, Spain, North Africa. First foothold on both African and European shores.
• 146 BCE–30 BCE: Conquest of Greece, Asia Minor, Syria, Egypt (30 BCE). The entire Mediterranean rim—Spain to Syria, Morocco to Egypt—falls under Roman control.
• 27 BCE–476 CE (Principate/Dominate): Pax Romana secures sea lanes. Piracy suppressed (Pompey, 67 BCE). Grain fleets from Egypt and North Africa feed Rome (1M+ people).

Why "Our Sea" Was Literal

• Both shores: Every coastline—Europe, Africa, Asia—was Roman territory or client state.
• No rival navy: After Actium (31 BCE), no power could contest Roman naval dominance.
• Legal unity: Roman law governed maritime commerce, contracts, piracy trials across the basin.
• Infrastructure: Lighthouses, ports, naval bases (Misenum, Ravenna, Alexandria, Carthage) formed an integrated network.

Cultural Resonance

The term appears in Cicero, Livy, and imperial inscriptions. It expressed not just possession but civilizational unity: Mare Nostrum = the space where Romanitas prevailed.

After Rome

Byzantines kept the eastern half; Arabs called it Bahr al-Rum (Sea of the Romans); medieval Italians used Mare Nostrum again (Venice, Genoa). Mussolini revived it fascistically (1930s). Today, it's a historical term—but the Mediterranean's unity-as-a-basin remains a geopolitical concept (Union for the Mediterranean, EU maritime policy).

Rome didn't just border the sea. It owned the sea—and named it accordingly.