7 metres under Bloomberg's European HQ is a Roman temple you can visit free. Tomorrow, Thu 5 Nov, it's open until 8pm.

Slide by slide.

1. The reconstructed Roman temple of Mithras in a dark room, its low walls lit from below, with an outline of Mithras etched on glass at the far end. Text: A Roman temple 7 metres under Bloomberg. Free, open till 8pm Thursday.
2. The marble head of Mithras in a Phrygian cap, the top of the cap rough and damaged, against a plain beige background. Text: Head of Mithras. Found on the dig's last planned day, 1954.
3. A round marble relief of Mithras killing a bull, framed by a circle of zodiac signs. Text: Mithras killing a bull. The scene at the heart of his cult.
4. A close view of the reconstructed temple's low brick and stone walls, lit from below, with the outline of Mithras etched on a glass screen behind. Text: Rebuilt 7 metres down. Close to where it was found.
5. A wall-sized display case of Roman finds: pottery, tiles, tools and fragments on pale grey shelves. Text: More than 14,000 finds from the 2012 to 2014 dig.
6. How to visit, with a street map showing the London Mithraeum between St Paul's, Bank and Cannon Street. Text: Open until 8pm on Thu 5 Nov. 12 Walbrook, by Bank. Free. Booking encouraged.