26 photographs of the Hohenzollern, Habsburg-Lorraine families and their entourages, various formats by various studios, often signed with dedications, early 20th century:

Joseph-Ferdinand of Habsburg-Tuscany, Archduke of Austria

Grand Duchess Elena Vladimirovna, Princess of Greece with her three daughters, signed and dated 1907

Augusta Victoria of Hohenzollern-Sigmaringen, Queen Consort of Portugal,

Franz-Salvator of Habsburg-Tuscany in Neuhof and Eichenwald, 1913

Marie-Valérie of Austria

Adolf of Nassau, Grand Duke of Luxembourg with Princess Adelheid-Marie of Anhalt-Dessau, Wilhelm IV, Frederick II, Grand Duke of Baden, Princess Hilda of Nassau... 

including 4 photos by R. Lechner, Wien, of the Austrian Imperial Cavalry during a re-enactment