Mavro Kalavritino nearly ceased to exist. Tetramythos found the three surviving sub-varieties - Mavro (the main one), Psilomavro (small grape), and Hontomavro (large grape) - and began rescue propagation around 2009-2011. All three are now permitted under PGI Achaia appellation. The wine has thin skin (low anthocyanins, so a light ruby color), serious tannin concentration, and high acidity from growing at 650-1,050 meters on the coldest vineyards in Greece. Decanter reviewed it; Jancis Robinson has noted it. You are drinking a resurrection. At Tetramythos wine bar and tasting room in Ano Diakopto, Aegialia (free tastings, no appointment required), specifically ask for the Mavro Kalavritino. Ask your host: 'How close did this grape come to disappearing?' - it unlocks the rescue story. Look at the color: thinner than Pinot Noir, almost translucent at the rim. Taste for the tannin structure that belies the pale appearance.
🔄 BACKUP: If Mavro Kalavritino is sold out of the current vintage, ask to taste the Roditis (white) - another indigenous variety from these same high-altitude slopes. The altitude and north-facing exposure story is equally compelling.