Since 1550 the House of the Dukes of Este has produced a precious condiment named Aceto Sopraffino, earmarked to enhance, season and preserve refined dishes prepared and served at the Este Court. The Sopraffino vinegar received the approval of those who tasted it to the point that it was often given as a gift to rulers and dignitaries of the European Houses who had appreciated it during their stays at the Estes estates in Ferrara and Modena. The Sopraffino vinegar is a unique and historical condiment of Italian cuisine and must not be confused with Balsamic vinegar as, unlike this, it is produced by acetifying raw must of red grapes; the Balsamic vinegar instead is made of white wine vinegar and cooked must coming from white grapes.