A more thorough explanation:

Definition: Libellus rerum is a Latin term used in history to refer to an inventory.

Example: A libellus rerum could be a list of all the items in a household, such as furniture, clothing, and kitchenware.

Explanation: Libellus rerum was commonly used in ancient times to keep track of possessions and assets. It was a way to organize and manage resources, especially in households and businesses. The example given illustrates how a libellus rerum could be used to list all the items in a household, making it easier to keep track of what was owned and what was needed.