Saffron slowly propagated throughout much of Eurasia and was later brought to parts of North Africa, North America, and Oceania. Saffron was detailed in a 7th-century BC Assyrian botanical reference compiled under Ashurbanipal. Documentation of saffron's use over the span of 3,500 years has been uncovered. Saffron-based pigments have indeed been found in 50,000-year-old depictions of prehistoric places in northwest Iran. The Sumerians later used wild-growing saffron in their remedies and magical potions. Saffron was an article of long-distance trade before the Minoan palace culture's 2nd millennium BC peak. Ancient Persians cultivated Persian saffron ("Crocus sativus" 'Hausknechtii') in Derbent, Isfahan, and
Saffron Germany, and Switzerland—among them the Swiss village of Mund, whose annual output is a few kilograms. Microscale production of saffron can be found in Australia (mainly the state of Tasmania), Canada, Central Africa, China, Egypt, parts of England France, Israel, Italy (Basilicata), Mexico, New Zealand, Sweden (Gotland), Turkey (mainly around the town of Safranbolu), the United States (California and Pennsylvania). Greece is a saffron producer with a history of 3 centuries of cultivation of a saffron called "Krokos Kozanis", having started exports to the United States in 2017. Saffron prices at wholesale and retail rates range from US$500 to US$5,000