K. E. von Hahn & Co. Five photographers at the Imperial Court, Tsarskoye Selo, circa 1900. Set of five photographic prints mounted on cardboard, depicting portraits of Grand Duchess Olga Konstantinovna and her son Andre of Greece. Dimensions: 34 × 26 cm for four photographs; 33 × 20 cm for one. The boards bear embossed studio marks; one of the photographs is signed in pencil. Grand Duchess Olga Konstantinovna (1851, Pavlovsk - 1928, Rome), wife of King George I of Greece. After her husband's assassination in 1913, she returned to Russia, founded a military hospital in Pavlovsk during the First World War and became a nurse herself. She was the grandmother of Grand Duke Dimitri Pavlovitch, one of the accomplices in the assassination of Grigori Rasputin, and of Philip, Duke of Edinburgh, husband of Queen Elizabeth II of England. Joint: Photograph of the Queen of Greece, Grand Duchess Olga Konstantinovna and others on the steps of Tatoi Palace. March 1907. 33 × 23 cm. Provenance: Greek royal family.