Starting in August 1938, the Swiss artist Helen Dahm was painting colorful murals on the inside walls of Meher Baba's crypt. She was absorbed in her work from morning to evening. Although Helen was not a young woman, (she was 60 at the time) out of love, she worked on her back on top of scaffolding to paint the dome's ceiling. 

Hedi Mertens, also a painter, would assist Helen by mixing her paints; but Helen did the actual painting of the figures.

It was only when Baba ordered Pendu to build a dome over this crypt that everyone came to know this was to be the site of his future tomb.

 This was the room where Baba had secluded himself in 1927 and where he had the Prem Ashram boys drink from the Cup of his love. It was also where he would spend the night until the Tin Cabin was built on the hill in 1935. All became aware that the "underground pit" was to house his last physical remains, and they regarded this humble structure with added sacredness.