The evidence for a temple to the eastern goddess Isis is indicated by graffito on a 1st-century flagon found in Tooley Street, Southwark which reads LONDINI AD FANVM ISIDIS, or ‘To London at the temple of Isis’.
The existence of the temple is confirmed by an altar inscription which confirmed that the temple that had ‘fallen down through old age’ had been restored. The 3rd-century altar, found reused in the riverside wall (BC75), had been dedicated by Marcus Martiannius Pulcher, a hitherto unknown provincial governor. London is the only place in Roman Britain that has evidence for a temple to Isis and her cult must have remained an exotic exception to the other religions in the province.