Abstract
SOMMARIO: 1. Ad opus and precursors. – 2. Late medieval uses / trusts. – 3. Caesurae, and early trusts to 1659. – 4. Enlightenment trusts, 1659-c. 1760. – 5. Further propertisation late 1700s-late 1800s. – 6. Conclusion.The Authors agree to publish their works with a CC BY License.