The topic of this study is the music of Czech composers based mainly on the juxtaposition of styles, stylizations of historical or jazz music, and the use of quotations in the years between 1960 and 2000. It deals with reconstruction of the meanings of the period musical terms polystylism and collage, and it maps out the use of these terms in the reception of this music at the time and in the compositional theory and practice of Czech musical culture during that forty-year period. The main sources for the analysis of terms were reviews, articles, and scholarly studies in music journals along with the contemporary statements of the composers themselves at the time and at the present. In that context, the study follows the leading representatives from among composers and critics, derives the meanings of the terms polystylism and collage, and places them in the context of Czech music of that period. As an example of a specific composition reflected upon in the context of polystylism and collage and exhibiting a number of elements typical of this compositional orientation, the study contains an analysis of the composition Útěk (The Flight) written by Arnošt Parsch in 1973.