This temple of Mithras was a sensation when it was discovered during post-WWII redevelopment in 1954, bringing widespread attention to London's Roman heritage.

The ruins were subsequently dismantled, stored in a builder's yard and then clumsily reconstructed in 1962 outdoors a hundred yards from their original site with, as the Guardian put it, "all the mystery of a suburban front garden".

In 2010 Bloomberg purchased the site that included the original location to use as their European headquarters. They decided to restore the Mithraeum to a new custom space seven metres below the surface, and attempted to recapture the atmosphere of the mystery cult of Mithras.

The Mithraeum is free to visit, and is presented with a short light and sound experience complete with Latin chants and shuffling feet. The way they recreate the original pillars using shadows is a very neat touch.