More than 600 artefacts "of significant cultural value" have been stolen from Bristol Museum's archive in a "high-value" raid, police say.
Four men gained entry to a building in the Cumberland Basin area of the city in the early hours of 25 September, Avon and Somerset Police said.
Items from the museum's British Empire and Commonwealth collection were stolen and detectives are now trying to trace four men captured in the area on CCTV.
"The theft of many items which carry a significant cultural value is a significant loss for the city," Det Con Dan Burgan said.
"These items, many of which were donations, form part of a collection that provides insight into a multi-layered part of British history, and we are hoping that members of the public can help us to bring those responsible to justice," he added.
