the arch is the vagina esoterically architecturally speaking
There is a surprisingly long tradition of female genital symbolism in cathedral design. Many people believe that the interior of a gothic cathedral actually represents a womb, and its entrance a vagina, the pointed-arch shape being the shape of a vulva. St Paul’s Cathedral in Dunedin’s Octagon is an example of a cathedral with an entrance that could easily be interpreted this way. Some people go further and suggest that a rose window above the slit-like doorway represents a clitoris (it’s round, it’s above the vulva, and looked at from inside the cathedral, it glows as if engorged with blood). This explains why it is called a ‘rose’ window, despite looking more like a daisy than a rose – ‘rose’ is an anagram of the Greek word ‘eros’, meaning the god of sexual love. These people then go on to say that the two side-wings of a cross-shaped cathedral represent the fallopian tubes, and the baptisms that take place in the centre where the fallopian tubes meet the main body of the womb are a symbolic breaking of the waters in preparation for being born again. Admittedly, the only people I know of who seriously push this theory are protestant fundamentalists who see it as evidence that the medieval Catholic church was corrupted by Satan, and they probably also believe the dinosaurs were killed off by Noah because he couldn’t fit them on his ark. The more conventional theory is that cross-shaped cathedrals were designed to mimic the shape of a Roman torture device which Christianity adopted as its symbol after it was used to kill the son of god.
https://canofwormsopened.wordpress.com/2013/08/05/genital-symbolism-and-the-rebuild-of-christchurch-cathedral/