🛠️ Invention or technique

Kilwa copper coinage

Moneda de cobre de Kilwa

Date
c. 1100 · confidence medium
Place
Kilwa Kisiwani, Lindi, Tanzania
Credited to
Sultans of Kilwa
Field
Communication

⚠️ Disputed: the sources disagree.

What it is

Copper coins minted with the sultan's name for local coastal trade. They have been found at Great Zimbabwe and in the Wessel Islands, in northern Australia.

Shanga (Kenya) already minted silver coinage in the 9th century. The chronology of the sultans of Kilwa is disputed; the Australian coins were found in 1944.

What it led to

  • the monetisation of Swahili coastal trade
  • evidence of contacts across the Indian Ocean
  • Kilwa's dynastic propaganda
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Sources✓ verified 2026-09-25