A mystery Roman capsule unearthed at an archaeological dig in the heart of London is to be opened on Monday.
The 2,000-year-old sealed tin canister was discovered by a team of archaeologists who have been excavating the site in Southwark, just south of the Thames, for the past year.
It is unclear what is inside, but recent discoveries at the site have included a life-size bronze foot.
The capsule measures about 5.8cm in circumference and is plainly decorated.
"We just don't know what's in there," said Gary Brown, managing director of Preconstruct Archaeology, the company behind the dig.
"This box is still sealed, and what's inside is more than 2,000 years old.
"It could be nothing, or it could be the remains of a sacrifice. We'll have to wait and see."
The site is believed to be the remains of a Roman temple complex dating from around the time of the birth of Jesus Christ.
As well as the bronze foot, an ancient plaque bearing the oldest known naming of London was recently unveiled.
Experts said the plaque appeared to refer to a champagne importer and newspapers said it could be viewed as London's earliest known advert.
The capsule will go on immediate display at the Museum of London, along with all the other finds.
Excavation work has now come to an end at the site, which itself will not be preserved.
The slice of prime London real estate has been earmarked for a housing development with hundreds of homes to be built.