Architects and artists copied the solar eclipse/vesica piscis and its mathematics in their sacred buildings and artwork to reflect their religious beliefs.
en.wikipedia.org One author claims that the total solar eclipse inspires images of the vesica piscis.
en.wikipedia.org The aureola, when enveloping the whole body, generally appears oval or elliptical in form, but occasionally depicted as circular, vesica piscis, or quatrefoil.
en.wikipedia.org The deities are depicted in vesica-shaped (elliptical) frames, the arts under arches, and the virtues in plain rectangles.
en.wikipedia.org The aureola, when enveloping the whole body, generally appears oval or elliptical in form, but occasionally depicted as circular, vesica piscis, or quatrefoil.
en.wikipedia.org