Elizaveta Ivanovna de Witte (nee Ammosova), a famous educator and historian, has been undeservedly forgotten. She was the author of numerous scientific and popular works, a full member of the Historical Society of Nestor the Chronicler, published in numerous journals like Chteniya v Istoricheskom obshchestve Nestora letopistsa, Russkoe delo, Zarya, Rus', Pravdivoe slovo. She was publishing the collections Book for Reading at School and at Home, the second volume of which included her version of The Word on Igor's Regiment, based on G.P. Pavsky's translation. E. de Witte made several trips to foreign countries, where she paid much attention to the situation of Slavic peoples. In the summer of 1903, E. de Witte went to Austria-Hungary and visited Bukovina and Galicia. Her creative legacy includes works on the history, socio-economic and religious situation of the Rusins in Austria-Hungary: Bukovina and Galicia (1903), Ugro-Rus. Past and Present. Absolutism and Constitution (1907), How Galicians Live under the Constitution (1908), The Russian-Polish Question in Galicia. 1804-1909 (1909), Austria-Hungary and Its Slavic Peoples (1912), Galician Rus in Its Past and Present (co-authored with E.F. Turaeva-Tsereteli, 1915). She was also interested in the Rusins of the Kholmshchyna (Chelm Land, 1909). With her works on the history of Carpathian Rus, E. de Witte contributed much to the further studies of the history of Rusins and promoted the interest to this ethnic group in the general public and academic community of Russia.