A team of archaeologists has recently gotten to work on a massive excavation that is turning up thousands of human skeletons from a Bedlam burial site in London.

According to CNN, the scientists have already excavated 3,000 skeletons at what is now the Liverpool Street Station for the Cross-London rail. Known at the time as Bethlehem or New Churchyard, the burial ground may have been used for 20,000+ Londoners from 1569 to 1738 or later.

Al Jazeera America compiled several photos of the dig site.

The skeletons are believed to belong to victims of the English Civil War, the Great Plague of 1665 and the Great Fire of London in 1666. Nick Elsden, project manager from Museum of London Archaeology (MOLA), told CNN the site is "a varied cross-section of society throughout the years since the burial ground was open."

In all, 60 archaeologists are working the burial ground and the excavation is expected to run into Sept. of this year.

"This is probably the first time a sample of this size from this time period has been available for archaeologists to study in London," excavation lead archaeologist Jay Carver told the Telegraph. "Bedlam was used by a hugely diverse population from right across the social spectrum and from different areas of the city."

Following the excavation, which began as early as 2013, will be extensive cleaning and examination.

"1665 was the very last recorded episode of plague. There were 400 years of regular plague, and suddenly it stops," Carver told CNN. "And what we want to be able to find out, from sampling the graves of that date, is why that is. And what it is about the bacteria that causes bubonic plague that suddenly changed at that point.

"And that was a huge exercise which couldn't have possibly been done by our own team."