at the Castle of
Torgau'', by
Lucas Cranach the Younger, 1544 In 1532, John Frederick succeeded his father as elector. In the beginning he reigned with his half-brother,
John Ernest, but in 1542 became sole ruler. Chancellor
Gregor Brück, who for years had guided the foreign relations of the country with ability and prudence, remained also his councilor, but his open and impulsive nature often led him to disregard the propositions of his more experienced adviser, so that the country was in frequent danger, especially as John Frederick was not a far-sighted politician. He consolidated the Lutheran State Church by the institution of an electoral
consistory (1542) and renewed the church visitation. He took a firmer and more decided stand than his father in favor of the
Schmalkaldic League, but on account of his strictly Lutheran convictions was involved in difficulties with
Philip I, Landgrave of Hesse, who favored a union with the Swiss and Strasburg Evangelicals. He was averse to all propositions of Popes
Clement VII and
Paul III to support calling a
General Council, because he was convinced that it would only serve "for the preservation of the papal and anti-Christian rule"; but to be prepared for any event, he requested Luther to summarize all articles to which he would adhere before a council, and Luther wrote the
Schmalkald Articles. At the Diet of Schmalkalden in 1537 the council was refused, and the elector treated the
papal legate with open disregard and rejected the propositions of Matthias von Held, the imperial legate. , Berlin He followed the efforts at agreement at the
conference of Regensburg in 1541 with suspicion and refused to accept the article on justification which had been drawn up under the supervision of
Gasparo Contarini to suit both parties, and Luther, his steady adviser, confirmed him in his aversion. The efforts at agreement failed, and the elector contributed not a little to broaden the gulf by his interference in the ecclesiastical affairs of
Halle and by aiding the Reformation which had been introduced there by
Justus Jonas. His attitude became more and more stubborn and regardless of consequences, not to the advantage of the
Protestant cause. In spite of the warnings of the emperor, of Brück, and of Luther, he arbitrarily set aside in 1541 the election of
Julius von Pflug as the
bishop of Naumburg, and instead instituted
Nicolaus von Amsdorf as bishop, and introduced the Reformation. In 1542 he expelled Duke
Henry V of Brunswick-Wolfenbüttel from his country to protect the Evangelical cities
Goslar and
Brunswick and introduced the Reformation there. Entanglement in other wars hindered
Emperor Charles V from interfering and by apparently yielding he succeeded in concealing his true intentions. The elector appeared personally at the
diet of Speyer in 1544. The harmony of the emperor with the Evangelicals appeared never greater than at that time. He permitted the
Regensburg declaration of 1541 to be embodied in the new recess and acknowledged all innovations which the Evangelicals had made between 1532 and 1541 because he needed the aid of the Protestants against
France. John Frederick actually thought that peace had come and continued the ecclesiastical reforms in his country. Even the growing discord among the allies did not disturb him. When the
Schmalkaldic War broke out in 1546, he marched to the south at the head of his troops, but the unexpected invasion of his country by his cousin Duke
Maurice compelled him to return. He succeeded in reconquering the larger part of his possessions and repelling Maurice, but suddenly the emperor hastened north and surprised the elector. The
Battle of Mühlberg, 24 April 1547, went against him and dispersed his army. He received a slashing wound to the left side of his face, leaving him with a disfiguring scar from his lower eye socket down his cheek. He was taken prisoner by Charles V and sent into exile in
Worms. ==Prisoner==