Knowing the artist’s story helps understand the imagery, Gruber argues. “In 1936, the Nazis labelled JoKarl Huber’s art as ‘degenerate,’ and he was no longer allowed to work,” he says. St. Peter and Paul’s priest at the time, August Uhl, granted the artist asylum, along with a commission for renovation. Uhl’s sermons tended to be in opposition to the Nazis, which is why the Gestapo allegedly often showed up at his home, Gruber says. There is no doubt “the stained glass window represents an unequivocal and courageous statement against National Socialism and its leaders,” German historian Michael Kuderna told DW. His most recent book is about Hitler images in churches. In the course of his research, he found five images of Hitler that predate 1945 and nine that date to after 1945. With the early images, it can be difficult to prove they really show the dictator, but the later images clearly show Hitler, for instance as an executioner, or a villain burning in hell.