🛠️ Invention or technique

Greek fire

Fuego griego

Date
c. 672 CE · confidence high
Place
Constantinople (Istanbul), Turkey
Credited to
Callinicus of Heliopolis, a Syrian refugee in Constantinople
People
👤 Calínico de Heliópolis600–700
Field
Conflict

⚠️ Disputed: the sources disagree.

What it is

Incendiary mixture based on crude oil, resin and quicklime, projected under pressure through bronze siphons from ships, which burned on water. A secret weapon of the Byzantine state.

Later than the 500 CE cut-off but included by explicit request; the exact recipe was lost and its composition remains debated.

What it led to

  • The saving of Constantinople in the Arab sieges of 674-678 and 717-718
  • State secrecy as technological policy and industrial espionage
  • Flamethrowers and incendiary projectiles in Islamic and Chinese armies
  • Byzantine naval dominance for centuries
  • survival of the Byzantine Empire in 678 and 718
  • naval warfare with chemical weapons and bronze siphons
  • a legacy in Islamic incendiary weapons (naft) and in early fire lances
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Sources✓ verified 2026-09-25