Discover 50 Super Weird Historical Facts 2 years ago Prev Article Next Article Prev7 of 51NextUse your ← → (arrow) keys to browse Fact 7: During the 17th century, tulip bulbs were so valuable in the Netherlands that they were used as currency. This period was known as “Tulip Mania.” Prev7 of 51NextUse your ← → (arrow) keys to browse Facebook Prev Article Next Article