His scholarship was exceptionally broad, covering the notation of early Byzantine music, the ars nova, Renaissance motets, Haydn, and Verdi.
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In the history of Byzantine music manuscripts the cherubikon appears quite late in liturgical manuscripts with musical notation, not before the late 12th century, while the earliest sources are of Carolingian origin—sacramentaries with a so-called "Missa greca" like a Hadrianum written in Korvey (near Aachen).
It is one of the Renaissance's more eclectic works, covering not only the instrumental istanpittas of the Italian Trecento and earlier Franciscan laudas, but also Byzantine chant, girl songs from Cyprus preserved in the Manuscript 1203 kept in Iviron monastery, Persian and Arabic dances, traditional Music of Mongolia and Ancient Chinese ceremonial music.
The music sung during the offices is neo-Byzantine, based on the works of 19th century Romanian psalmodists: Macarie the Hieromonk, Nectarie the Hermit, Anton Pann, Dimitrie Suceveanu, Greek chants translated into Romanian, or modern compositions.
The School of Ecclesiastic Music (SEM) is a school of Byzantine music in Matn, Lebanon.
He is the director of the Children's Byzantine Choir of the Archdiocese of Athens since its foundation and the director of the School of Byzantine Music at the Diocese of Elis.
Retiring from teaching in 1966 he moved to Grottaferrata, Italy, continuing his research on Byzantine music at the Abbey of Santa Maria (Badia Greca) there.