The article strives to assess main groups of sources on the functioning of the Yaroslavl Demidov higher educational institution in the 19th – early 20th century. Drawing on archival material that is being thus introduced into scientific use, the article establishes that, as it changed its organizational form, the Demidov educational institution went through the following stages in its development: the Yaroslavl Demidov School of Higher Sciences (1803–1834); the Yaroslavl Demidov Lyceum

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... 8); the Demidov Juridical Lyceum (1868–1918). Sources on the topic are divided into five groups. Some are published, other materials from the Russian State Archive of Ancient Acts, the Russian State Historical Archive, and the State Archive of the Yaroslavl Region are being introduced into scientific use for the first time. Legislative sources support a detailed study of the complex of key aspects of the higher education in the 19th – early 21st century. Their systematic analysis allows the author to determine the main development vector of the Demidov higher educational institution in the studied period and the legal frameworks of the Demidov Lyceum. The article shows the importance of paperwork and statistical sources for recreating its daily educational and extracurricular activities. Various reports provide data on the work of the Demidov higher educational institution over decades and summarized information on its student and teaching corps. In socio-economic terms, the analyzed facts indicate some staff turnover among teachers, intensification of the student movement in 1905–1907, all the while the school material base remained stable. The periodical press, memoirs, diaries, and travel notes contain unique information on the evolution of higher education in Yaroslavl and on the arrangements of student life. The corpus of historical sources permits to identify and detail main stages in the history of the Yaroslavl Demidov higher educational institution.