There are various different reasons. Cardinal Richelieuwas a French clergyman, nobleman, and statesman, serving as King Louis XIII's Chief Minister (sometimes also called First Minister) from 1624. He sought to consolidate royal power and strengthen France's international position.
They gained power by Establishing absolute monarchy in France. ... When his son and successor Louis XIV came to power, a period of trouble known as the Fronde occurred in France, taking advantage of Louis XIV's minority. This rebellion was driven by the great feudal lords and sovereign courts as a reaction to the rise of royal power in France.