(unmentioned in wikipedia article) There's a golden age of science fiction story whose author I don't recall that had a story hinging on surviving the crushing pressure of Jupiter's atmosphere.
While putting it forward that no material could withstand a differential pressure of
(Jupiter pressure XX atmosphere) | (Human necc. 1 atmosphere)
a (fictional) solution was proposed of staggered shells, each reducing the pressure by 1 atmosphere (the amount required for a vacuum airship).
I'll throw it out there for anyone to chase up or recall the story name + author.
This reduction in stages notion is mentioned in the above article and it does prompt the question of whether a modern honeycomb material could be fabricated as a thick walled shell about a ballon shape with interior vacum and pressue reduction staggered through the honeycomb.