Balsamic vinegar began as a big secret in Italy. Italian families would pass it on as an heirloom, give it as a gift to friends, or bequeath it to a daughter as part of her dowry. Can you imagine how precious if they had red raspberry balsamic to present to their closest friends and family.
The first historical reference to balsamic vinegar dates back to 1046, when a bottle of balsamic vinegar was given to Emperor Enrico III of Franconia as a gift. In the Middle Ages, it had a reputation as a miracle cure -- good for everything from sore throats to labor pains.
Balsamic vinegar is a reduction made from grapes, but it is not considered a wine vinegar because the grape juice used is unfermented. The unfermented white sweet grape juice that is used is called must and comes from the wine grapes... and red raspberry balsamic is born.