Oath of Silence Protects Amazing 500-Year-Old Diving Bell Used to Visit Sunken Roman Vessels | Ancient Origins March 14, 2016 by Hālau ʻĀha Hūi Lanakila in Newsletter A vow of silence has protected the mystery behind an ingenious invention for nearly 500 years. Source: Oath of Silence Protects Amazing 500-Year-Old Diving Bell Used to Visit Sunken Roman Vessels | Ancient Origins Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Click to share on Pinterest (Opens in new window) Pinterest Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Reddit (Opens in new window) Reddit Click to share on Pocket (Opens in new window) Pocket Click to share on Tumblr (Opens in new window) Tumblr Like Loading... Related