Mieczysław Tomaszewski, Polish musicologist and editor. Professor at the Music Academy in Cracow, head of the Department of Musical Work Theory and Interpretation. He represents the humanist-oriented current within musicology. He studied with Stefania Łobaczewska at the Jagiellonian University in 1954-9, and obtained a PhD degree at the Adam Mickiewicz University in Poznań for his dissertation The output of F. Chopin and its reception (1984). From 1952 he worked at PWM Edition in Cracow (becoming editor in chief in 1954, and director in 1965-88). In 1960-6 he taught music theory and aesthetics at the Jagiellonian University. From 1958 he was also lecturer at the PWSM (later Music Academy) in Cracow (becoming reader in 1971, and professor in 1989). In 1966-86 he headed the Post-Graduate Study of Music Editing which he also founded, and later directed the Department of Music Editing from 1967, and the Music Analysis and Interpretation Team in 1976-86. In 1982-5 he was member of the Main Council of Academic Education. He was the editor of numerous editorial series, including Documenta Chopiniana, Chopin Library, Library of Miniature Scores, Musica Viva. He has published writings in ontology, analysis and interpretation of the musical work, the relationship between word and music, theory and history of song, and Chopin. He has headed the Musical Meetings in Baranów, chaired the Scientific Board of the F. Chopin Society and International Chopin Symposium in Warsaw. Today, he is active at the Polish Chopin Academy, and is a member of the Programme Board of the National Fryderyk Chopin Institute.

Tomaszewski's research focuses on Romantic music and the Romantic current in modern Polish music, on the theory of European song, and on the affinity between arts. At the center of his interests is the music of Fryderyk Chopin. Apart from his academic research on Chopin - which culminated in his milestone synthetis Chopin: Man, Work, Resonance(Poznań 1998), he is also the author of popular books and radio programmes on Chopin.

Mieczysław Tomaszewski has lectured on Chopin and Polish music in Paris, Dijon, La Châtre (Nohant), Valldemosa, Mariánské Lázně, Vienna, Graz, Gamming, Dresden, Leipzig, Hamburg, Essen, Düsseldorf, Chemnitz, Aarhus, Vilnius, Bratislava, London and New York.

He has been scientific editor of 14 volumes of the Chopin Library (1959-86) and 5 volumes of the Documenta Chopiniana series (1970-90). Currently, he is co-editor of the Rocznik Chopinowski and Chopin Studies. Among his other achievements are a biographical film about Chopin (TVP2/Arte, 1997), a cycle of 44 radio programmes Fryderyk Chopin. Complete Works (Polish Radio 2, 1999-2000), and the first multimedia encyclopedia dedicated to a single composer Fryderyk Chopin. Życie twórcy (F. Chopin. An Artist's Life, 1st version 1990, 2nd version 2000).

Mieczysław Tomaszewski's books include:

• Kompozytorzy polscy o Fryderyku Chopinie. Antologia [Polish Composers about Chopin. An Anthology], Cracow 1959
• Pieśni Fryderyka Chopina. Zarys monograficzny [The Songs of Fryderyk Chopin. A Monographic Sketch], 1960 (unpublished)
• Chopin. Diariusz par image [Chopin. A Diary in Images, with Bożena Weber as author of the iconographic part, also available in English and German], Cracow-Warsaw 1990
• Muzyka Chopina na nowo odczytana [Chopin's Music Read Anew], Cracow 1996
• Chopin. Człowiek, dzieło, rezonans, [Chopin: Man, Work, Resonance], Poznań 1998, 2nd updated edition: Cracow 2006
• Frederic Chopin und seine Zeit, Laaber 1999
• Chopin i George Sand, Cracow 2003, 

From Tomaszewski's numerous texts on Chopin, published in 7 languages, the following stand out:

• Filiacje twórczości pieśniarskiej Chopina z polską pieśnią ludową, popularną i artystyczną [Filiation of Chopin's song output with Polish folk, popular and artistic song], 1961
• Uwagi o ewolucji stylu Chopina [Some remarks on the evolution of Chopin's style], 1979
• Chopin Fryderyk Franciszek, entry in vol. 2 of the PWM Music Encyclopedia, 1985
• Le style de Chopin et ses transformations, 1989
• Fantasie f- moll Op. 49. Genese Struktur, Rezeption, 1995
• Présence de Chopin chez les musiciens contemporains et postérieurs, 1995
• Z badań nad rezonansem muzyki Chopina: Etiuda a-moll op. 25 nr 11 w świetle jej słownych interpretacji [Research on the resonance of Chopin's music. The Etude in A minor Op. 25 No. 11 in the light of its verbal interpretations], 1996
• Chopin, Kurpiński i pieśń powszechna [Chopin, Kurpiński and popular song], 1999
• Chopina Scherzo cis-moll op. 39. Od proweniencji do rezonansu [Chopin's Scherzo in C sharp minor Op. 39. From provenance to resonance], 2000
• Les mélodies de Chopin et leurs particularités dans le contexte du lyrisme vocal européen, 2002
• Chopin w kręgu wartości [Chopin in the circle of values], 2002
• Chopin's inspirations from Polish common song, 2003
• Fryderyka Chopina stosunek do wiary [Chopin's religious attitude], 2003
• Autour de phénomène de la musique de Chopin. De la provenance à la resonance, 2004
• Zawirowania wokół Mazurka a-moll op. 17 nr 4 [Controversy around the Mazurka in A minor Op. 17 No. 4], 2004
• The Nocturne in Db major Op. 27 No 2, 2005

In 1999, Mieczysław Tomaszewski received the Polish Science Foundation Award, and the Jan Długosz Publishers' Prize for his Chopin monograph Chopin. Man, Work, Resonance. In 2000, he was also distinguished by the International F. Chopin Foundation for his lifetime work on the output and character of Chopin, with special regard to the book Chopin. Man, Work, Resonance. In 2016 he was honored with Honoris Causa tittle by the Academy of Music in Katowice.

He was invited to the Programme Board of the NIFC in September 2001.