This series, founded in 1990 following an earlier suggestion by Mazzino Montinari, publishes source material on Nietzsche's life, his environment, and the effects of his work. Thus, the Supplementa complement the critical editions of Nietzsche's works (KGW) and letters (KGB).

This series, founded in 1990 following an earlier suggestion by Mazzino Montinari, publishes source material on Nietzsche's life, his environment, and the effects of his work. Thus, the Supplementa complement the critical editions of Nietzsche's works (KGW) and letters (KGB).