History of saffron stores from wild flowers, believing that divine intervention alone enables saffron's medicinal properties. Such evidence suggests that saffron was an article of long-distance trade before Crete's Minoan palace culture reached a peak in the 2nd millennium BC. Saffron was also honoured as a sweet-smelling spice over three millennia ago in the Hebrew Tanakh: In ancient Persia, saffron ("Crocus sativus" 'Hausknechtii') was cultivated at Derbena and Isfahan in the 10th century BC. There, Persian saffron threads have been found interwoven into ancient Persian royal carpets and funeral shrouds. Saffron was used by ancient Persian worshippers as a ritual offering to their
Saffron per gram, given the wide possible range of colouring strengths that different kinds of saffron can have. Despite attempts at quality control and standardisation, an extensive history of saffron adulteration, particularly among the cheapest grades, continues into modern times. Adulteration was first documented in Europe's Middle Ages, when those found selling adulterated saffron were executed under the "Safranschou" code. Typical methods include mixing in extraneous substances like beetroot, pomegranate fibres, red-dyed silk fibres, or the saffron crocus's tasteless and odourless yellow stamens. Other methods included dousing saffron fibres with viscid substances like honey or vegetable oil to increase their weight.