France and Italy can both claim that it belongs to them
“Red vermouths are called Italian vermouths,” says Leboulengé. "Soon after [the 18th century], the vermouth production crossed the Alps and the French started to produce their vermouth, white and dry, thus becoming French vermouths.”
Both white and dry vermouth come from the same base wine
“Many believe that white wine is used for white and dry vermouth and red wine for red vermouth, but in reality the wine base is white for all types,” says Leboulengé. “Infused botanicals can bring the reddish/brown color but more often it is caramel added that will bring the color.”
There are five different styles
Rouge, blanc, extra dry, dry, and half dry. And no, they’re not interchangeable.