For ten points, identify this French queen who ruled as regent after the death of her husband Louis XIII in 1643 until her son, Louis XIV, came of age in 1654.
At one point, this monarch was opposed by a movement nicknamed the "cabal of the important," whose leader, the duke of Beaufort, this ruler imprisoned as a result. Despite the advice of a close counselor, this ruler forbade the surrender of Dunkirk to England, resulting in that city's capture by an Anglo-Spanish force. This ruler was humiliated by a rival's spies when she was caught visiting the nunnery at Val-de-Grace to correspond with her brother, Philip IV of Spain, in the midst of a war. Earlier, this ruler had been unsuccessful in persuading her husband to dismiss Cardinal Richelieu during the Day of the Dupes, and in 1651 she was forced to dismiss Mazarin as a result of the Fronde uprising. For ten points, identify this French queen who ruled as regent after the death of her husband Louis XIII in 1643 until her son, Louis XIV, came of age in 1654.
At one point, this monarch was opposed by a movement nicknamed the "cabal of the important," whose leader, the duke of Beaufort, this ruler imprisoned as a result.
Anne of Austria [prompt on partial answer]