Experts have excavated a medieval stone at a graveyard in Dundee.

It has been removed from the Howff after being spotted by an archaeologist working as part of a community group to preserve the site in July.

With the stone covered in moss and half-buried in the ground, permission from Historic Environment Scotland was required to have it removed for cleaning.

A number of inscriptions were found on the stone during the two-day excavation process on Sunday and Monday but the origin of the artefact is still unknown.

It is believed to date from between the 12th and 13th centuries.

Simon Goulding from the Dundee Howff Conservation Group said: "The stone has a number of inscriptions on it.

"Including that of David Lindsay, former Master of Dundee Grammar School and Bishop of Edinburgh who went on to crown Charles the 1st.

"But mystery still surrounds the origins of the stone itself. "

The discovery is part of a wider community initiative to try to protect the site for future generations.

After work to preserve the stone is complete it is hoped it can remain in the graveyard to highlight the long and hidden past of this historic Dundee site.

Before the discovery the oldest visible monument in the cemetery was that erected in 1577 to the memory of James Muir, Burgess in Dundee.