- Wines and Crémants from Alsace - Owned by the Siebert family for several generations, the winery has been managed since 2021 by Estelle, oenologist. She has a global approach to the environment, cultivation practices and adequate wine-making tools to express the best potential of the terroir. On the land of the Grand Cru Altenberg de Wolxheim, the domain produces vintages resulting from parcel selection.