A more thorough explanation:

res coronae

Res coronae refers to things that belong to the Crown, such as old estates, tributes paid to the king, and freedoms.

• An ancient manor that has been in the possession of the Crown for centuries is an example of res coronae.
• When a king demands tribute from his subjects, it becomes a res coronae.
• Liberties granted by the Crown, such as the right to hunt or fish in certain areas, are also considered res coronae.

These examples illustrate how res coronae refers to things that are owned or controlled by the Crown. They are often historical in nature and have been passed down through generations of monarchs.