London Mithraeum

The London Mithraeum is one of the most important Roman finds in Britain. Built around AD 240 on the bank of the long-buried Walbrook stream, it served the mystery cult of Mithras, the bull-slayer, popular with Roman soldiers and merchants. The temple was discovered during bomb-site reconstruction in 1954, drawing long queues. After decades on a temporary plinth, Bloomberg moved it in 2017 beneath its new European headquarters and reopened it as the London Mithraeum. Visitors descend seven metres below street level into a darkened chamber where the temple outline is reconstructed with light and sound. Entry is free; advance slot booking is recommended.