The Temple of Mithras, Walbrook are the remains of a Roman Temple that was discovered in 1954 and now relocated in the basement museum of the Bloomberg Building between Cannon Street and Queen Victoria Street, London.
The temple and museum can be visited for free: https://www.londonmithraeum.com/
https://en.wikipedia.org/wiki/London_Mithraeum
164 photos taken in July 2021 with a Sony a6000 and processed in Reality Capture.