The Oranienstein Letters were a series of letters sent by William V, Prince of Orange, in December 1801 from the Oranienstein Palace near Diez, Germany.
Guillermo sent them to 15 ex-governors in favor of the House of Orange in the former Dutch Republic, who advised them to refrain from collaborating with the new pro-revolutionary authorities. This meant that his previous instructions against the Batavian Republic given by the Letters of Kew were no longer in force. He and his son, Guillermo Federico, also recognized the Batavian Republic as legitimate and renounced their hereditary title of estaúder.
These were the requisites demanded by the First Consul Napoleon of the French Republic to receive compensation for the loss of their possessions in the Netherlands, confiscated by the Batavian Republic.
William V only issued these letters after long meditations and subsequently refused to accept the secularized lands of the monastery of Fulda and Corvey Imperial Abbey as compensation. However, he approved that his son receive them giving rise to the title of Prince of Nassau-Orange-Fulda.
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