(CNN) -- A crew is at work in Boston unearthing a time capsule believed buried by patriots Samuel Adams and Paul Revere.
The 18th-century capsule was left in a cornerstone of the Massachusetts State House, CNN affiliate WBZ reports. The capsule is believed to date from 1795, when construction started on the building.
The cornerstone has been removed because of repair work to the historic building, and a worker from the Museum of Fine Arts in Boston was chipping away at it Thursday to get at the capsule.
It's a painstaking process, reports WBZ NewsRadio reporter Carl Stevens, who tweeted about the capsule removal Thursday morning.
The capsule contains rare coins, a Paul Revere plate, papers and other artifacts dating back to the 1600s, said Massachusetts Secretary of State William Galvin, who also heads the state's historical commission.
Galvin told CNN that its contents are expected to be revealed sometime next week.
More at Crew unearths Boston time capsule from Paul Revere era
The 18th-century capsule was left in a cornerstone of the Massachusetts State House, CNN affiliate WBZ reports. The capsule is believed to date from 1795, when construction started on the building.
The cornerstone has been removed because of repair work to the historic building, and a worker from the Museum of Fine Arts in Boston was chipping away at it Thursday to get at the capsule.
It's a painstaking process, reports WBZ NewsRadio reporter Carl Stevens, who tweeted about the capsule removal Thursday morning.
The capsule contains rare coins, a Paul Revere plate, papers and other artifacts dating back to the 1600s, said Massachusetts Secretary of State William Galvin, who also heads the state's historical commission.
Galvin told CNN that its contents are expected to be revealed sometime next week.
More at Crew unearths Boston time capsule from Paul Revere era
