Archaeologists are hoping to unearth some ancient secrets at three of the Queen's residences over the weekend.
Time Team will be at residences including Buckingham Palace
Digs will take place in the grounds of Buckingham Palace, Windsor Castle and the Palace of Holyroodhouse, Edinburgh.
Among the treasures the archaeologists hope to uncover is evidence of a Roundhead fortress from the English Civil War at Buckingham Palace.
The historical excavations are being undertaken for Channel 4's archaeology programme Time Team.
Experts also hope to unearth the remains of an Edward III building at Windsor Castle, and trace the story of Mary Queen of Scots at Holyroodhouse.
The programme's presenter Tony Robinson said the Queen wanted to know what lies beneath the grounds she has walked in since she was a child.