The origins of diving suits and where the idea came from

Back in the early 1400's a drawing was found and it said is it was made by a guy named Konrad Kyeser. The drawing was a concept of a diving dress in a bubble but there is no phyicle proof of it exsiting so all we know is that its just a concept. Now this is a vary early concept of diving suits although the concept started in the same time period. The concept of diving suits came form millitary, under water salvage, and exploration. There for the first ever diving suit was made in england by john lethbrige. After the idea of his diving suits every one started to make diving suits inspierd by his and concepts. Plenty of video games were inspired by some of the suits aswell.