the first son of Grand Duke Nikolai Nikolaevich (the eldest) and Grand Duchess Alexandra Petrovna, grandson of Nikolai I 1) Photograph 1900s 16.5 x 10.5 cm. Silver gelatin print. Owner’s inscription on the back. 2) Postcard «Grand Duke Nikolai Nikolayevich, Commander-in-Chief of the Russian Army.» Paris: French Red Cross, 1914. 13x8.5 cm. 3) The postcard «Emperor Nicholas II and the Grand Duke Nikolai Nikolaevich in Przemysl.» B. m., 1915. 14x9 cm 4) Photograph «Grand Duke Nikolai Nikolayevich, Commander-in-Chief in the Caucasus». 1917 21.5 x 10.5 cm. Silver gelatin print. Handwritten signature of the Great Prince on the front side of the photo. Owner’s inscription on the back. 5) Photograph. Studio G. Lassave, Antibes, 1880s 23.5x17.5 cm. Albumin print. Provenance: From the personal collection of Ferdinand Tormeier (1858-1944) - a Swiss teacher, mentor and adviser to the children of Emperor Alexander III and Empress Maria Feodorovna.