Thornton Abbey Black Death plague pit excavated Published duration 30 November 2016

image copyright University of Sheffield image caption Dr Hugh Willmott said the mass burial was "completely unexpected"

A Black Death burial pit containing 48 skeletons, including the remains of 27 children, has been found at the site of a 14th Century monastery hospital.

The bodies were excavated at Thornton Abbey in North Lincolnshire.

Between 1347 and 1351 the "Great Pestilence" swept westward across Europe killing millions of people. It later became known as the Black Death.

It arrived on Britain's shores in 1348 and is believed to have wiped out up to 60% of the population at the time.

Dr Hugh Willmott, from the University of Sheffield's Department of Archaeology, said: "The finding of a previously unknown and completely unexpected mass burial dating to this period in a quiet corner of rural Lincolnshire is thus far unique, and sheds light into the real difficulties faced by a small community ill-prepared to face such a devastating threat."

The large burial site suggests the community was overwhelmed by the Black Death and the number of people who died, he added.

image copyright University of Sheffield image caption Tests revealed the presence of Yersinia pestis (the bacterium responsible for the plague)

The plague

The plague is one of the oldest identifiable diseases known to man

It is spread from one rodent to another by fleas, and to humans either by the bite of infected fleas or when handling infected hosts

Recent outbreaks have shown that plague may reappear in areas that have long been free of the disease

It can be treated with antibiotics such as streptomycin and tetracycline

Source: World Health Organization

Remains of teeth from the skeletons found at the site were sent to a university in Canada where ancient DNA was successfully extracted.

The tests revealed the presence of Yersinia pestis, the bacterium responsible for the plague.

Two further 14th Century plague pits were also uncovered - one in 2013 , the other in 2014 - during the building of the Crossrail project in London.