Ferdinand I of the Holy Roman Empire

Definition and stakes

Various Encyclopaedia Britannica, 11th Edition…

After 1648 the emperor was engaged in carrying out the terms of the treaty and ridding Germany of the foreign soldiery. In 1656 he sent an army into Italy to assist Spain in her struggle with France, and he had just concluded an alliance with Poland to check the aggressions of Charles X, of Sweden when he died on the 2nd of April 1657. Ferdinand was a scholarly and cultured man, an excellent linguist and a composer of music. Industrious and popular in public life, his private life was blameless; and although a strong Roman Catholic he was less fanatical than his father.
Source: Gutenberg

Various Encyclopaedia Britannica, 11th Edition…

This deed was followed by the peace of Prague, concluded in 1635, primarily with John George I., elector of Saxony, but soon assented to by other princes; and this treaty, which made extensive concessions to the Protestants, marks the definite failure of Ferdinand to crush Protestantism in the Empire, as he had already done in Austria and Bohemia. It is noteworthy, however, that the emperor refused to allow the inhabitants of his hereditary dominions to share in the benefits of the peace. During these years Ferdinand had also been menaced by the secret or open hostility of France.
Source: Gutenberg

J. N. Larned History for ready reference, Volume 2…

The Protestants looked forward with dread to his reign if he should receive the Imperial crown. Styria had become almost wholly Lutheran. When Ferdinand succeeded his father, he had driven out the Protestant families, and made the land altogether Catholic. No Catholic prince had ever shown himself more reckless as to the means by which he served his church. The Protestants, therefore, had good reason to fear that if he became Emperor he would renew the policy of Charles V., and try to bring back the old state of things, in which there was but one Church as there was but one Empire.
Source: Gutenberg

Get perspective with Kwize: daily news enlightened by great literature