Country home of Sir Henri Deterding in Dobbin, north of Berlin: Dobbin Estate
Castle Dobbin was located in an area now known as Dobbin-Linstow, district Rostock. (Glave is a municipality of Dobbin-Linstow in the district of Rostock in Mecklenburg-Vorpommern.
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Shell House Berlin opened in 1932
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Bruce Deterding article above
Royal Dutch Shell Wikipedia Article downloaded 19 JAN 2016 (NO MENTION OF SIR HENRI DETERDING)