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Château Hosanna, formerly Château Certan-Giraud, is a Bordeaux wine from the appellation Pomerol. The winery is located on the Right Bank of the Bordeaux wine region, in the commune of Pomerol in the department Gironde. As all wine produced in this appellation, Château Hosanna is unclassified, but Certan-Giraud has historically been estimated among the great crus of the region.