What overall trend in French royal power do the maps show?

The map depicts a tendency of French royal authority development.

By the middle ages, the king had practically complete power over what is now France.

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The map shows a trend of expansion of French royal power.

Explanation:

At first, French royal power was exclusively held in the areas that sorround Paris (Ile-de-France), while the rest of the country was controlled by local feudal lords.

With time, as the Middle Ages progressed, French monarchs began to accumulate more and more power, from central France, to North and South.

By the end of the Middle Ages, the monarch controlled almost the totality of what is now France.

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