Marceli Kosman (8 May 1940 – 29 December 2023) was a Polish historian who was a professor at the Adam Mickiewicz University in Poznań.
Kosman finished secondary school in 1957. Then he studied at the university in Poznań.[1] He gained MA in history in 1962 and PhD in 1966.[1] The title of Kosman's doctoral thesis was Dokumenty i kancelaria wielkiego księcia Witolda.[1] His supervisor was Henryk Łowmiański.[1]
From 1961 to 1968 he was teacher in the secondary school (liceum) in Izbica Kujawska.[1] In 1971 he passed his habilitation.[1]
Kosman died on 29 December 2023, at the age of 83.[2]