🛠️ Invention or technique

Great Dam of Marib

Gran presa de Marib

Date
c. 700 BCE · confidence medium
Place
Marib, Marib Governorate, Yemen
Credited to
Kingdom of Saba (inscriptions of Yatha'amar Bayyin)
Field
Tools

⚠️ Disputed: the sources disagree.

What it is

Earth-and-masonry dam about 580 m long that diverted the floodwaters of Wadi Adhanah towards two sluice-gated canals with spillways, irrigating some 9,600 ha. For more than a millennium it sustained the agricultural oasis that enriched the kingdom of Saba.

There have been diversion works at Marib since the 2nd millennium BCE; the great sluice-gated dam is dated by inscriptions to the 8th-6th centuries BCE and was repeatedly repaired until its collapse, recalled in the Qur'an (Surah 34).

What it led to

  • large-scale irrigation agriculture in the Arabian desert
  • prosperity of the incense trade
  • Arab migrations after its final collapse (c. 570 CE)
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Sources✓ verified 2026-09-25