The focus of this study is on the history of jazz music between 1959 and 1967. The 1950s was a period of intense creativity in jazz, defined by emerging styles such as third stream, cool jazz and hard bop. The end of that decade, 1959, is considered to be a watershed year in which some of jazz’s most influential recordings were made and also effected the free jazz movement, which dominated until 1967, known as the "year that jazz music died". Therefore, 1959 becomes a bridge between the stylistic homogeneity of first half of the century and an outpouring of creativity in the second half. The echoes of the pre-fusion period 1959-1967 are still influential on the musical output of jazz in the twenty first century. This study aims to convey the variety of jazz styles between 1950 and 1967 by looking at the foundational elements that create the musical understanding of these styles by means of a descriptive methodology. Keywords: Jazz, Free Jazz, Hard Bop, 1959, Third Stream, Cool Jazz, Avant-Garde