While Balsamic vinegar from Italy has become a household staple you may not be so familiar with the Spanish counterpart, aged Sherry (wine) Vinegar.
Both sherry (the wine) and the vinegar have been produced in southern Spain since well before the 16th century. It is believed that the Greeks first brought wine to Spain in the 5th or 6th century. The use of vinegars for food and medicinal purposes is mentioned in the bible.
One premier producer is Jerez de la Frontera. Jerez has been producing sherry since at least since the 16th century. Duque de Diano located in Jerez is the largest producer in of aged sherry vinegar in the world.