Currently known by: Isaac, although Miria is aware that the Iron Crowns exist
The Duke pays his troops in thick, silver coins he mints in his keep, with his profile on one side, and a crown on the other. They are called Iron Crowns, by his mercenaries and the people of Elderwood. Because he must pay his mercenaries to keep them loyal, he keeps a huge amount of silver bars in his vault. The vault is protected by a magically bound entity—no one knows if it’s a spirit, golem, dude, whatever, just that it exists—that is said to have the power to destroy anyone who tries to steal from Tanlan.