Camillo Berneri ( also known as Camillo da Lodi ; 1877 , Lodi -- May 5 1937 , Barcelona ) was an Italian professor of philosophy , anarchist militant , propagandist and theorist . Camillo Berneri ( also known as Camillo da Lodi ; May 28 , 1897 , Lodi -- May 5 , 1937 , Barcelona ) was an Italian professor of philosophy , anarchist militant , propagandist and theorist .