On May 10, 1933, German students from what were considered some of the finer Universities, joined together in Berlin, as well as other German cities, to burn books that they felt had "unGerman" ideas. Today outside Humboldt University, an underground room with empty bookcases is a reminder as to what happened that night. Referred to as "The Empty Library," plaques along the outside glass read: "Where one burns books, it is only a prelude; in the end one also burns people."