Bruno Bernhard Gröning (May 30, 1906 – January 26, 1959) was a German mystic who rose to fame in the late 1940s for performing faith healings.

[2] He trained as a carpenter for a time, but also worked variously as a waiter, an electrician, a furniture marker, a paint seller, and as a repairman of bicycles, sewing machines, and watches.

The family also changed its surname from Grönkowski, Grenkowski, or Grzenkowski - records are unclear - to the more German sounding Gröning in 1936.

[5] With intense media coverage in magazines, radio and Wochenschau newsreels, soon tens of thousands of people were filling the horse paddocks near the inn where Gröning was lodging at the outskirts of Rosenheim, hoping that his "healing rays" (Heilstrahlen) would cure them of war injuries, blindness, and other handicaps and ailments.

[5] Gröning spoke to them from a balcony and had small tin foil balls (allegedly charged with his healing powers) distribute to those that he was not able to touch in person.

[5] After half a year Gröning was forced to leave Rosenheim amid charges of negligent homicide of a 17-year-old girl with lung disease; he later received several suspended prison sentences and fines.

The Bruno Gröning Circle of Friends was listed as a commercial sect in an official 1997 report by the Berlin Senate Committee.