The composer Jani Christou is considered as one of the most important representatives of the Greek musical production in the 20th century. It is very interesting to reveal the diversity of his compositions during the last ten years of his life, his personal style and the resultant aesthetics, as well as the way he approached the techniques of primitive expressions (ritualisation, sacrifice) through “metapraxis” and the relationship which is being established between art and metaphysics. In order to comprehend sufficiently the period in question, first of all we will present the main events that marked the composer’s life outlining at the same time the most essential characteristics of his compositions up to 1960. Afterwards, we will analyze his major works during the period that concerns us (1960-1970) in order to show the writing techniques and the extramusical ideas (very often in Jani Christou’s work) that influenced deeply his compositions. Since we’re not aiming to make a presentation of his musical production, our study will focus on the composer’s musicological and aesthetical points of view, while we will try simultaneously to place these elements in connection with his age and his contemporaries.