What term is used for a colony's owning country?

Is there a term for the country that owns or rules a colony from overseas?

Sample sentences:

Quebec's ____ was France.

After the French and Indian War, Quebec's ____ was Britain.

Spain was a major _____ and it colonized many countries throughout the world.

The word "colonizer" emphasizes the colonizing aspect more than the ruling aspect, so it does not seem to fit always, such as in the second sentence. I need to emphasize the control over politics, not the act of settling.

You can use the term colonial ruler to emphasize that the colonizing nation/country is the ruler of the colonized territory.

From Colonialism: A Theoretical Overview by Jürgen Osterhammel:

Colonialism is a relationship between an indigenous (or forcibly imported) majority and a minority of foreign invaders. The fundamental decisions affecting the lives of the colonised people are made and implemented by the colonial rulers in pursuit of interests that are often defined in a distant metropolis.

From Unveiling the Nation: The Politics of Secularism in France and Quebec By Emily Laxer:

...France was an arms-length colonial ruler in the territory now known as Quebec.