Batu kegilaan
caption: Pencabutan Batu Kegilaan karya Hieronymus Bosch
caption: Quentin Matsys , An Allegory of Folly (awal abad ke-16). Tokoh "bodoh" ( fool ) punya batu kebodohan di dahinya
caption: Pieter Huys, A surgeon extracting the stone of folly
caption: Jan Sanders van Hemessen, 1550-an
caption: After Hieronymus Bosch, abad ke 16
caption: Pieter Quast, Die Steinoperation , 1630