Ehrenmal in Zellertal, photo credit: Donnersberg Touristik Verband e.V. Fachenbach Medienagentur When I arranged to meet H.O. Spanier of Weingut Battenfeld Spanier, one of Germany’s leading growers, in the Zellertal, he wrote to me: “Zellertal is probably one of Germany’s most dynamic regions. I began investing in its most limestone-rich sites 30 years ago.” Since then, interest in the Zellertal has built gradually. But in the past few years, that interest has exploded.