london is indeed an onion, it's layers are deep and it takes a considerable amount of research and walking skills to pentrate it. the mithras temple underneath the bloomberg building is at it's heart although i suspect it goes deeper. 
as you decend a time line shows you how london was overlaid with various structures and events, one covers the other. it's quite something. there is indeed a hidden esotericism. secret societies, hidden messages in sculptures and architectures, one could easily feel lost within a labyrinth or at the outskirts of a maze. there's a weird formality to it all as initiates pass through invisible gates and doors, and enter chambers unveiled and deeper knowldge revealed beyond ythe pagan heart and astrological centre. one can never be certain about how deep it goes but what is known is the deeper yo go the harder it is to return the same as when one went in. london is a city of mysteries, conspiracy and concealment. it's heirachy is almost inpenetrable which is why the keys to the city are needed. and also why only a handful have them.

on a lighter side i visit some of christopher wrens churches, st. pauls is the obvious one but st. mary le bow is the one which interests me most as it determined my birth as a cockney. those born within it's church bells are true londoners aka cockneys and i was well within it's circle. rebuilt after the great fire of london by wren it now stands magnificently as a testiment to his finest achievements. one has to acknowledge his genius when you stand inside and look upwards. it's as close to holy as a man could get in human endevours. 

on the darkside i also visited one of wrens students designs for churches nicholas hawksmoor whom one could say was not a christian at all, his designs were neo pagan and possibly satanic. paying special attension to the locations, one can see an obvious pattern.

if one includes the london eye into the pattern the structure takes on a more obvious meaning as the all seeing eye.

st. lukes in oldfield, st.george in bloomsbury, st.john in horsleydown, st.george in the east, st. annes limehouse, christchurch in spitalfields, st. pauls.

peter ackroyd's novel is well worth reading as is iaan sinclairs, lud heat