[3] The Byzantine liturgy heard regularly from the church opposite his family home, Cretan traditional music, with its rapid dances of repeated small motifs, played by local instruments at the town’s weekly festivities, but at the same time the sound of the waves, and the detonation of land-mines in the aftermath of World War II, all these formed part of the acoustic universe of the composer as a child.

Due to his father’s extensive private library he had the opportunity to deepen his knowledge, beyond school education, in literature, philosophy, history and the arts.

He then selected young musicians, singers and actors, from both the city and the provinces, and collaborating with painters and poets he presented a series of performances with his musical works Ilios o Protos (Sun the First), Chroniko (Chronicle), Ithagenia (Nativeland), Thitia (Lifetime), Stratis Thalassinos Among the Agapanthi (poetry by Giorgos Seferis, Nobel Prize 1963), Oropedio (Mountain Plain) at the Lydra venue which he named music-studio.

In 1976 he composed the popular liturgy The Free Besieged, based on the poem by Greece’s national poet Dionysios Solomos, that he conducted in the crowded Panathenean Stadium, and which was presented in London in 1979.

Numerous invitations for concerts abroad followed, in Paris, Berlin, Frankfurt, Munich, Amsterdam, Stockholm, Canada, Russia, Australia and the United States.

Markopoulos continued composing music for the theatre and for the cinema, collaborating with directors such as Jules Dassin, George Cosmatos, Nikos Koundouros and Spyros Evaggelatos.

For a period he sought a more private life with his family while preparing for the opening of a new chapter in his music, compositions that would display melodic outbursts sustained by polytonic quality and dazzling rhythms of an inexhaustible exuberance.

In 1987 he founded the Palintonos Armonia Orchestra (the name deriving from Heraclitus) with which he would give concerts in Greece and abroad and record many of his works.