The end of the 60s was an important period in jazz, as well as rock music, in Poland and the rest of the world, with the development of many styles and trends in popular music. The death of Polish musician KRZYSZTOF KOMEDA marked the end of a particular stage in Polish jazz. In 1970 the jazz rock fusion band, LABORATORIUM was formed in Kraków, although it is necessary to search further back in time for its roots. JANUSZ GRZYWACZ, LABORATORIUM ‘s leader, made his first steps in the musical world in Kraków.