Souverain's 120-year-old estate in the Alexander Valley is the primary source for grapes for the illustrious portfolio of Souverain wines. Killian consistently produces outstanding wines that represent the best of Alexander Valley, including an Alexander Valley Sauvignon Blanc, Chardonnay, Merlot and Cabernet Sauvignon, as well as the flagship Winemaker's Reserve Alexander Valley Cabernet Sauvignon.