Flax is known cultivated plant, birthplace unknown. However, there is evidence that it was cultivated for fiber IV-V century BC in Assyria and Mesopotamia. And the ancient Egyptians wrapped in a cloth of linen mummy.
Spotkanie articles of linen worn by ancient Jews and the Egyptians, and the Romans had imported them from Spain. Also flax used as a drug, because in ancient times was known for its therapeutic properties.
Now cultivated flax is grown all over the world, it is the second leading fiber crop after cotton.