Stephanie's letters from Portugal to her mother, Josephine of Baden, between 1858 and 1859 are preserved in the Hohenzollern-Sigmaringen family archive, which is in the State Archive of Sigmaringen (Staatsarchiv Sigmaringen) in the town of
Sigmaringen, Baden-Württemberg, Germany. Stephanie's letters from Portugal to her brother, Leopold of Hohenzollern-Sigmaringen, between 1858 and 1859 are also preserved in the State Archive of Sigmaringen (Staatsarchiv Sigmaringen). ==References==