Born in Thessaloniki 1931, he is the son of the poet George Themelis. A graduate of the State Conservatory of Thessaloniki- violin and theoretical lessons- he continued his studies in Munich with a scholarship (DAAD). He was taught violin from the professor, Kurt Stiehler and Musicology at the University of Munich and completed a PhD.
He was director of the State Conservatory of Thessaloniki (1971 – 1985), professor of Musicology at the School of Musical Studies of the Aristotle University of Thessaloniki (1985 – 1998) and four times president of the same School. He was also the Dean of Faculty of Fine Arts at the same University. Since 1998 he is emeritus professor. He was president of the Art Committee of the State Orchestra of Thessaloniki, liaison officer in Greece of the International Council for Traditional Music and since 1994 he is active member of New York Academy of Sciences and member of the Greek Composers Union. In 1990 he was honored from the Musical Association of North Greece with the gold award for his musical offering. He write the autobiographic book "The fatal trip to Icaria and the return"(greek) Ed. Notios Anemos Athens 2014 ( German translation from Jürgen Braun " Die Schicksalsinsel Ikaria" Ed. Traugott Bautz 2016 ).
Thomas Tamvakos, Ellenes Dimiourgoi: Dimitris Themelis ( In "Neoi Orizontes Epirus" 5.9.1995, p. 6-7)
Elleni Mpentilla-Kakaratsou,"Synantisa prosopa tis polis mou sto telos tou aeona" (Thessaloniki culturcity of Europa 1997)
Spyros Soufis, I mousiki tou Dimitri Themeli ( Periodiko"mousikotropies" Thessaloniki 1999,p p. 28-32)
Maria Spanou, Griechische Konzerte fuer Violine im 20. Jahrhundert( Master,Universitaet fuer Musik und Darstellende Kunst,Wien 1999,pp.29-37)
Eugenios Politis, Die Griechische Konzertliteratur fuer Kontrabass (Master,Universitaet fuer Musik und Darstellende Kunst, Wien 2002,pp.67-68)
Apostolos Chandrakis, Das Streichquartett in Griechenland (Master,Universitaet fuer Musik und Darstellende Kunst,Wien 2002,pp.16-68)
Anna Dani, To sythetiko kai mousikologiko ergo tou Dimitri Themeli( Master,School of Musical Studies of Aristotle University Thessaloniki)
Apostolos Kostios, Preludio kai Chasapico, ergo gia Cembalo tou dimitri Themeli(Anna-Dani pp.109-112)
The following four papers in the conference-contributions of School of Musicology and Art of Macedonian University of Thessaloniki ( ed. in electronic magazine mus.-e.journal 2014):
Markos Dragoumis, The Symphony No.3 op. 86 of Dimitris Themelis(Greek)
Athena Katsanevaki, One person-Two worlds: the oral tradition and the formalism in the life of my teacher Dimitris Themelis(Greek)
Anna-Maria Rentzeperi-Tsonou,The Composer Dimitris Themelis-The song in his work (Greek)
Giorgos Zervos, The portrait of Dimitris Themelis in his book "Morfology of music and Analysis-Introduction (Greek)
Giannis Karavidas, "Dimitris Themelis, Trip in his youngyears in the life and in the melody" Ed. Notios Anemos,Athens 2015
Themelis made many publications among others about Ancient Greek music,Greek traditional music. Since his youth he is also occupied with composition, however the greatest part of his works was composed during the last two decades, by which he formed a musical language of his own. His compositions were played in Greece and abroad. The World Premiere of his Symphony No. 3 took place on 28 February 2003 in Glasgow, in Hall of Royal Scottish Academy of Music and Drama, given by the BBC Scottish Symphony Orchestra.
He composed, among other:
- 10 Symphonies, Symphonic Diptychon, 2 Symphoniettas for String Orchestra, Symphonic Poem "The Russian Painer Monk Efrem"
- 11 Concertos (for violin, violoncello, viola, double bass, bassoon,piano, alto saxophon, timpani )
- 2 Concertinos one for Violin and Orchestra and one for Flute and String-Orchestra
- 30 String quartets, string quintet
- Wind quartet, 5 Saxophone quartets, 2 brass quintets
- Duos for several instruments
- Songs with piano and with orchestra, chorals
- Works for several solo instruments