In early 1999, Etablissements Jean-Pierre Moueix purchased a property in Pomerol called Château Certan-Giraud. The property consisted of two distinctly different parcels; the parcel on the elevated part of the property was renamed Château Hosanna and the remaining parcel was later sold.
Hosanna's vineyards lie adjacent to those of Petrus, Lafleur, Vieux Château Certan. Château Hosanna has a significant amount of 40-year old Cabernet Franc vines which are planted on 30% of the vineyard. The wine is a blend of 80% Merlot and 20% Cabernet Franc. Christian Moueix believes that the fine, gravelly soil and high percentage of Cabernet Franc give Hosanna the potential to be the Cheval Blanc-style wine in his portfolio.