A fire broke out in St Mary Redcliffe Church when a suspected arsonist is believed to have used a candle to light banner inside the historic building.
The blaze happened in the Lady Chapel at around 9pm on Sunday, February 2.
Detectives at Avon and Somerset Police have now released grainy a CCTV image of a man they would like to speak to in connection to the incident.
PC Ella Gibson said: “We are keen to identify the man captured on CCTV as part of our investigation.
“We believe this incident is a one-off, but, as a precaution, we would recommend people do not walk alone in the church grounds when it is dark for their own safety.
“Anyone who recognises this man or saw someone acting suspiciously in that area of Bristol that night, is asked to call 101 and quote crime reference number 5220027001.”
The man is described as 30-35 years old, approximately 5ft 10ins to 6ft 1ins, of medium build, with cropped hair, or bald. He was said to be wearing a black puffer jacket, black trousers and white trainers.
