Nicholas Roerich had contact with the Great White Brotherhood, the positive internal government of earth, he designed the Banner of Peace.

"The Banner of Peace is a symbol associated with the Roerich Pact, the first international treaty aimed at the protection of artistic and scientific institutions and historical monuments.

The pact, signed on April 15, 1935, represents a significant milestone in the international effort to safeguard cultural values and heritage. The Banner of Peace was proposed by Nicholas Roerich, a prominent figure in the development of the pact, as a universal emblem to signify protected cultural sites under the agreement."

(https://en.wikipedia.org/wiki/Banner_of_Peace)

Link

https://cosmicsong.org/index.php/history/nicholas-roerich-contactee-with-the-great-white-brotherhood