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>https://en.wikipedia.org/wiki/Vesica_piscis
When arranged so that the lens is horizontal, with its two overlaid circles placed one above the other, it symbolizes the interface between the spiritual and physical worlds, represented by the two circles. In this arrangement, it also resembles the ichthys (fish) symbol for Christ, and has also been said to be a symbol of life, of "the materialization of the spirit", of Christ's mediation between heaven and earth, and of the eucharist.