I've read that theory several times here
date?
Octogon
"The studio behind Nosferatu, Prana Film, was a short-lived silent-era German film studio founded in 1921 by Enrico Dieckmann and occultist artistAlbin Grau, named for the Hindu concept of prana.Although the studio's intent was to produce occult- and supernatural-themed films, Nosferatu was its only production, as it declared bankruptcy shortly after the film's release."
https://en.wikipedia.org/wiki/Nosferatu