Peter Gläser

Peter "Cäsar" Gläser (7 January 1949 – 23 October 2008) was a German rock guitarist and singer. He spent most of his career and life in what was then East Germany, notably as a guitarist in the bands the Klaus Renft Combo and its successor, Karussell. He also had a solo career. He was one of East Germany's best known rock musicians.After nearly 25 years of negotiating his performing career around and with the East German authorities, early in 1989 he was stripped of his citizenship and expelled to West Berlin. It was a short-lived exile, as the East German government dissolved later that same year.

His autobiography appeared on 12 March 2007. Since that time much of the media focus involving his career has concentrated on the revelation that between 1967 and 1989 he provided information to the Ministry for State Security as an informal collaborator. The Stasi records identified him under the code name "IM Klaus Weber".