Marek Kościkiewicz is a Polish musician and songwriter, known for his work in the pop and rock genres. He gained popularity as a member of the band De Mono, which was formed in the late 1980s. The band is recognized for its catchy melodies and engaging lyrics, contributing to the Polish music scene. In addition to his work with De Mono, Kościkiewicz has pursued a solo career, releasing several albums that showcase his musical versatility. His contributions to music have made him a notable figure in Poland, where he continues to perform and create new material.