Holger Bernhard Bruno Mischwitzky (born Holger Radtke; 1942–2025), known professionally as Rosa von Praunheim, was a German film director, author, producer, professor of directing and one of the most influential and famous queer activists in the German-speaking world. A pioneer of Queer Cinema and gay activist from the very beginning, von Praunheim was a key co-founder of the modern lesbian and gay movement in West Germany and Switzerland. He was an early advocate of AIDS awareness and safer sex. Furthermore, he was one of the most important representatives of the New German Cinema.