 His unfinished manuscript on Lithuanian history was partially published only in 1893 and fully in 1967, but is significant as the first critical history of Lithuania and first scholarly analysis of the Lithuanian mythology.In contrast to Dionizas Poška or Simonas Daukantas, who searched for glorious and idealized history, Stanevičius carefully studied, validated, and cited his sources, remaining truthful to the facts, and was not afraid to reject romantic legends.He heavily criticized Teodor Narbutt and Maciej Stryjkowski as inaccurate.