 Henry was thrown into the dungeon and was held there ""unwashed and unshaven and deprived of any service"" over Christmas.At the Reichstag in Mainz, Henry prompted his father to hand over the imperial insignia (crown, scepter, imperial cross, holy lance and imperial sword).Henry IV then was transferred to Ingelheim where he personally was to hand over the imperial insignia and was forced to abdicate on December 31, 1105.