NPR ran an interesting article regarding churches that were inspired by The Beatles 1966 film “Yellow Submarine”.
Not long after the British-made film landed in the United States, “submarine churches” attracted urban, young people. They adopted the outline of a yellow submarine with a small cross on its periscope as their symbol and displayed it alongside peace signs, flowers and other popular emblems of the 1960s.
There were enough of the churches a year after the film’s release that they operated The Submarine Church Press, which published a national directory of 40 such churches, most with mainline Protestant or Catholic roots,