The remains of a medieval knight has been discovered after an excavation underneath a car park in Edinburgh, Scotland.

The discovery was made after archaeologists were called to a building site which was being prepared for a University of Edinburgh facitlity. The site was a former car park, in Edinburgh Old Town, according to BBC. Work was being carried out at the former car park while preparing to build the Edinburgh Centre for Carbon Innovation for the University of Edinburgh.

Archaeologists excavated the site and discovered the grave and remains of a 13th Century monastery underneath, which was also known to be the site of an 18th Century Old High School, 16th-century Royal High School and a 13th-century Blackfriars Monastery. The grave was marked with a sandstone slab with signs of a Calvary Cross and sword. Dozens of other artifacts have also been found as well.

The monastery was founded in 1230 by Alexander II, who was the King of Scotland between 1214-49. It is believed to have been destroyed during the Protestant Reformation in 1558. The ruins was believed to have been lost before the recent discovery.

"This find has the potential to be one of the most significant and exciting archaeological discoveries in the city for many years, providing us with yet more clues as to what life was like in Medieval Edinburgh," said Richard Lewis, City of Edinburgh council culture convener, according to BBC.

"We obviously knew the history of the High School Yards site while we were studying here but I never imagined I would be back here to make such an incredible discovery," said Ross Murray, the archaeologist who found the grave, who had studied at the University of Edinburgh.