their grave [A] in the Mausoleumgarten, Bückeburg.
her grave  in the Fürstliches Erbbegräbnis, Rhoden.
grave of spouse  in the Fürstliches Erbbegräbnis, Rhoden.
his grave in the Mausoleum, Gertrudenfriedhof, Oldenburg.
grave of spouse in the Mausoleum, Gertrudenfriedhof, Oldenburg.
her grave in the Mausoleum, Gertrudenfriedhof, Oldenburg.
their grave(s) in the Friedhof near the St.Katharinenkirche, Lensahn.
their graves [Sepultur] in the Abteikirche, Amorbach.
grave of 2e spouse (urn) in the Mausoleum, Gertrudenfriedhof, Oldenburg.
his grave in the Friedhof near the St.Katharinenkirche, Lensahn.