According to BBC News:
The tree from which the throne is carved was planted…at about the time Robert owned the estate, and was known locally as “the Bruce tree”.
When the 18ft tree was felled by a fire in 2005, the timber was salvaged…
Using an image from the Bruce’s official cast metal seal, which he used to authenticate documents, the group set about building a recreation of a throne the King sat on during his 23-year reign.
Ancient olive wood from Teba Spain is also incorporated to mark Robert the Bruce’s embalmed heart being carried into battle by Crusaders there in 1330.
