A more thorough explanation:

Capitalis terra is a Latin term that means "head-land". In history, it referred to a piece of land that was located at the head of other land.

For example, imagine a large piece of land that is surrounded by smaller pieces of land. The larger piece of land at the center would be considered the capitalis terra because it is at the head of the other pieces of land.

This term was commonly used in ancient times to describe the geography of a region. It helped people understand the layout of the land and how different pieces of land were connected to each other.