There’s a lot of mystery surrounding this ancient grape variety: some say it originated in Iberia, while others claim it’s from the Epire region located between Greece and Albania. It is thought to be the distant ancestor of Cabernet Sauvignon; though Carménère is also presumed to be a direct descendant.
However, what is certain is that this grape was the first to be cultivated in the Bordeaux region by the Romans during the 1st century A.D.—in fact, Biturica is the name Bordeaux was known by during that era. Today the name Biturica is revealed in the Tuscan wine “Predicato di Biturica”—a blend of Sangiovese and Cabernet Sauvignon.
Sources: Biturica Association; EncycloWine