Final answer:
Buildings and standing timber owned by someone other than the owner of the land are called Movables by Anticipation, which is a legal term for property expected to be separated from the land.
Step-by-step explanation:
Buildings and standing timber owned by someone other than the owner of the land are classified as Movables by Anticipation. This legal term is used to describe properties that are inherently part of the land but can be separated from it because they belong to someone other than the landowner. It is an anticipation of their eventual separation from the land. In the context provided, this situation could arise for various reasons, such as when the buildings and trees are on leased land, and the inhabitants' property (houses, gardens, mills, fields, vineyards, etc.) is distinctly owned by the lessee rather than the landlord. The taxation of such property would be based on its established value, separate from the land's value.