EUTOPIA
OATH OF SILENCE PROTECTS AMAZING 500-YEAR-OLD DIVING BELL USED TO VISIT SUNKEN ROMAN VESSELS
A vow of silence has protected the mystery behind an ingenious invention for nearly 500 years. The secrets behind Guglielmo de Lorena’s amazing diving bell, a technical marvel which allowed men to stay underwater for hours at a time, might predate officially recognized inventors by some 200 years.