Aleksandr Aleksandrovich Zimin (Александр Александрович Зимин; 1920-1980) was one of the most prolific and well-known Russian-Soviet medievalists. His area of expertise was late medieval Muscovy. Zimin was born in a noble family in Moscow. In the 1950s, Zimin edited the official historical series dedicated to the history of Moscow. However, at least seven of his monographs were not published during his lifetime. His 1964 essay attempted to prove that The Song of Igor's Campaign was fabricated in the 1770s. It met skepticism and hostility from the academic community and was eventually banned from being printed.