The year before he had been appointed to the position of Kapellmeister to Duke Johann Friedrich of Brunswick-Lüneburg; just months after the duke had assumed authority over the Principality of Calenberg upon his elder brother Georg Wilhelm's inheriting of the Principality of Lüneburg.
The County of Schaumburg proper was partitioned among the Schaumburg heirs into three parts, one incorporated into the ducal Brunswick and Lunenburgian Principality of Lüneburg, the second becoming the County of Schaumburg-Lippe and the third continuing the name County of Schaumburg, ruled in personal union by Hesse-Cassel.
In 1592, after the death of Duke William, the territory was enlarged with the Ämter of Hitzacker, Lüchow and Warpke, but Henry's demands for a transfer of sovereignty were not met.
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When Duke Henry went against a gentleman's agreement with his brother William and married Ursula of Saxe-Lauenburg in 1569, he had forsake sharing the government of the principality and was compensated instead with the Amt of Dannenberg and the Klosteramt of Scharnebeck.
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Harburg was defined as an hereditary possession and its territory increased by the district of Moisburg.
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He also continued the "systematic acquisition policy" (planmässige Erwerbspolitik) in the Lüneburg principality that had operated since the time of Otto the Child, "rounding off the Lüneburg allodial estate" (Arrondierung des Lüneburger Allodialbesitzes) through the purchase of numerous lands and rights, including those of Bleckede and Hitzacker, the County of Dannenberg and the County of Wölpe.
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Other branches that did not have full sovereignty existed in the Dannenberg, Harburg, Gifhorn, Bevern, Osterode, Herzberg, Salzderhelden and Einbeck.
The development of Sülze's salt spring was strongly encouraged by the dukes of the Principality of Lüneburg who wanted to create a counterbalance to the town of Lüneburg, which had largely succeeded in maintaining its independence from territorial lords as a result of the salt trade.
Welf pudding gets its name from the colours of the House of Welf (also known as the House of Guelph), a German aristocratic family that ruled the Principality of Lüneburg in medieval times.