medieval diving suit Konrad Kyeser, Bellifortis, Bavaria 1459.København, Det Kongelige Bibliotek, Th
medieval diving suit Konrad Kyeser, Bellifortis, Bavaria 1459.København, Det Kongelige Bibliotek, Thott 290 2º, fol. 44r -- source link
#bellifortis#medieval art#diving suit#15th century