Being fortunate enough to own some prime, south-facing parcels on the right side of the river, Carlos del Rio, who's family own Hacienda Monasterio, hired Peter Sisseck, the owner/winemaker of the famed Ribera estate Pingus, to take over the winemaking in 1995. Peter has helped to turn this old estate into a Ribera powerhouse with wines that can age for years.