Vesica Piscis - the core of the symplegma
The vesica piscis is a geometric shape formed by the intersection of two circles of the same radius, where the center of each circle lies on the perimeter of the other.
The symbol carries significant meaning across several disciplines:
Sacred Geometry: Often referred to as the "womb of the universe," it is considered the foundational building block of sacred geometry.
Christian Iconography: In religious art, the shape is called the mandorla (Italian for "almond"). It acts as a portal, symbolizing the intersection between the divine/heavenly realm and the earthly/material realm.
Mathematics: The exact mathematical length-to-width ratio of a vesica piscis is the irrational number (approx. 1.732).
Ancient Symbolism: Beyond Christian art, the shape has historically been associated with the divine feminine, maternity, creation, and fertility due to its visual likeness to a yoni (vagina).