The political plans of the cardinal when he undertook this siege were extensive. Let us unfold them first, and then pass on to the private plans which perhaps had not less influence upon his Eminence than the others.
Of the important cities given up by Henry IV to the Huguenots as places of safety, there only remained La Rochelle. It became necessary, therefore, to destroy this last bulwark of Calvinism—a dangerous leaven with which the ferments of civil revolt and foreign war were constantly mingling.