File:Kano dye cloth pit.jpg - Wikimedia Commons

5 centuries in business: Nigeria's ancient dye pits

File:Kano, Kano State, Nigeria.jpg - Wikimedia Commons

5 centuries in business: Nigeria's ancient dye pits

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Kofar mata dye pits nigeria hi-res stock photography and images

The Dying Dye Pits of Kofar Mata – Kamso Kids

Indigo, ash and time mark Nigeria's centuries-old dye pits

The Dying Dye Pits of Kofar Mata – Kamso Kids

Tie-dye - Wikipedia

5 centuries in business: Nigeria's ancient dye pits