Wartime reign .
Ferdinand III was elected as
king of the Romans at the
Diet of Regensburg on 22 December 1636. Upon the death of his father on 15 February 1637, Ferdinand became emperor. His political adviser Trauttmansdorff advanced to the position of Prime Minister of Austria and chief diplomat but was replaced by
Johann Ludwig von Nassau-Hadamar in 1647 because of health, which had begun to deteriorate. Trauttmansdorff was succeeded as
Obersthofmeister by the later Prime Minister
Johann Weikhard of Auersperg, who also taught the royal heir, Ferdinand IV. Unlike his father, Ferdinand III employed no spiritual counsellor. When Ferdinand became emperor, vast sections of the imperial territories had been absolutely devastated by two decades of war. The population was completely exhausted and massively diminished; countless people were impoverished, disabled, sick or homeless; and many had lost their families and had abandoned all moral standards. Ferdinand did not endeavour to continue the war, but the momentum of the war, the political circumstances and his reluctance to act prevented a quick end to the war. Any hope to make early peace with France and Sweden did not materialise. With the intervention of France in 1635, the war flared up again. After initial success and a combined Spanish-Imperial campaign into the heart of France in 1636, the military situation of the emperor sharply deteriorated. The Swedes regained initiative with victory at the
Battle of Wittstock in 1636 and threatened his recently gained allies:
Brandenburg-Prussia and
Saxony. Ferdinand reacted by redirecting his main army under Gallas from France to northern Germany in 1637. Gallas could contain the Swedes in
Pomerania until severe lack of supplies forced him to retreat back to Bohemia in late 1638. At the same time,
Bernhard of Saxe-Weimar, a German Protestant in French service, took the Habsburg possessions in Alsace and the stronghold of
Breisach after a
long siege. To check the advance of Swedish General
Johan Banér, who invaded Bohemia via Saxony in 1639, Ferdinand had to recall Piccolomini's army from the
Spanish Netherlands, which largely ended direct military co-operation with Spain. Although Piccolomini and the emperor's brother Archduke
Leopold Wilhelm, as the new Imperial commander, could repel Banér back to the
Weser river in 1640, the Bohemian lands now underwent continuous threat, and the emperor permanently lost control over northern Germany. An
Imperial Diet was arranged for 1641 in Regensburg, where the estates discussed possible peace arrangements. It turned out to be problematic that the Emperor had excluded princes, who had previously been on the opposing side, as well as the Protestant administrators of various princes of the Imperial Diet. However, it finally succeeded in making all
imperial estates agree with the exception of the
Electoral Palatinate, the
Duchy of Brunswick-Lüneburg and
Hesse-Kassel to the resolutions of the Diet. In 1641, a
preliminary peace was signed in
Hamburg between Ferdinand, Spain, France and Sweden, and a final peace congress was to convene in
Osnabrück and
Münster. An alliance between Sweden and France was fully effective since 1642. The Swedes won the
Battle of Breitenfeld in 1642. One year later, France decisively defeated Spain at the
Battle of Rocroi and could now dedicate more troops to the German theatre.
Peace negotiations Negotiations for a peace agreement began in 1644 in Münster and Osnabrück and lasted until 1648 while the war continued. The negotiations in Westphalia turned out to be difficult and began with a dispute over the rules of procedure. The emperor had to give in to pressure from France and Sweden and to admit all imperial estates to the congress and receive the
ius belli ac pacis. In addition to peace between the parties involved, the internal constitution of the empire was also newly regulated. The Imperial Court received weekly reports on the negotiations. Even though the reports had been produced by officials, the process also proved to be an extremely busy time for the emperor since despite all of his advisers, he had to make the decisions. The study of the documents suggests that Ferdinand was a monarch with expertise with a sense of responsibility and the willingness to make difficult decisions. In the course of the negotiations, Ferdinand had to reconsider his original goals according to the deteriorating military situation. His advisor Trauttmansdorff suggested a great battle to end the war favourably. The emperor personally took part in the campaign against the Swedes, which ended with a defeat at the
Battle of Jankau on 6 March 1645. The Swedish army under
Lennart Torstensson then advanced to Vienna. To raise morale in the city, the emperor circled the city in a large procession with an image of the
Virgin Mary. As the Swedish army drew closer, Ferdinand left the city. Archduke Leopold Wilhelm managed to drive off the opponents. At times, Ferdinand managed to get Prince
George I Rákóczi of
Transylvania, an ally of France and Sweden, on his side. In the 1645 Peace of Linz, the emperor had to guarantee the Hungarian estates the right of imperial representation and freedom of religion for the Protestants, which prevented the
Counter-Reformation and future absolutist rule in Hungary. The Habsburgs could no longer win the war without the support of their Spanish allies. Domestic difficulties stopped Spanish financial and military support for Ferdinand in 1645. Without foreign military funds, the Imperial troops were incapable of offensive operations, which weakened Ferdinand's position in negotiations.
Results of war The empire suffered considerable territorial losses. The
Three Bishoprics, effectively under French control since 1552, were officially ceded to France. The
Netherlands and
Switzerland gained complete independence. Within the empire, Sweden received
Rügen and
Western Pomerania, as well as the bishoprics of
Bremen-Verden and the city of
Wismar, as Imperial fiefs. The Tyrolean cadet line of the Habsburgs lost the
Sundgau and
Breisach in the Upper Rhine to France, as well as supremacy over the
Décapole. Further transfers of property took place in various regions of the empire.
Bavaria retained its electoral dignity that it had won at the beginning of the war, a further (eighth) electoral estate being created in the Palatinate. The implementation of the Counter-Reformation in the core countries of Ferdinand was sanctioned. Only in some parts of
Silesia were certain concessions made to the Protestants. From now on, the institutions of the empire would be equally occupied by Catholics and Protestants. The imperial estates could enforce considerable rights. That included the right to form alliances with foreign powers even if they were not allowed to be directed against the emperor or the empire. The largest territories benefited most from those regulations. Ferdinand's attempt at
absolutist rule of the empire failed, but the empire and the imperial office remained significant. Despite many losses, the constitutional position of the emperor after the
Peace of Westphalia permitted an active imperial policy in co-operation with parts of the estates. In the Habsburg monarchy, the prerequisites for the development of a uniform absolutist state remained intact. Thus, imperial policies of the peace negotiations succeeded in that respect despite the failure to meet some of the original negotiation goals.
Postwar , At the Nuremberg peace congress of 1649/1650, the final withdrawal of foreign troops and the political settlement of the relationship with Sweden and France were carried out during which hostilities nearly started again. Empress Maria Anna of Spain had died giving birth to her last child on 13 May 1646. Ferdinand remarried to another first cousin,
Maria Leopoldine of Austria (1632–1649), on 2 July 1648. The wedding ceremony, held in
Linz, was notably splendid. The marriage, however, lasted little more than a year and ended with Maria Leopoldine's own premature death in childbirth. Ferdinand's last marriage was to
Eleonora Magdalena Gonzaga of Mantua-Nevers in 1651. Empress Eleonora was very pious and donated, among other things, for the Ursuline monastery in Vienna and the
Order of the Starry Cross for noble women. She was also well educated and interested in art. She also composed music and wrote poetry and, together with Ferdinand, was the centre of the Italian Academy. Despite a considerable loss of authority in the empire, Ferdinand remained active in imperial politics. He would also re-establish his positions in the empire's institutions. Ferdinand had the
Aulic Council restructured, which competed with the
Imperial Chamber Court. It had already been recognized at the Peace of Westphalia and remained in effect until 1806. In late 1652, he summoned a
Reichstag in Regensburg, which lasted until 1654. The event was the last traditional imperial diet and was replaced by the future
Perpetual Reichstag, with its permanent congress of emissaries. The Reichstag decided that the content of the peace treaties in Münster and Osnabrück under imperial law should become part of the imperial constitution. The emperor managed to postpone some of the constitutional questions that were particularly dangerous for his power. The fact that some of the nobles who had been raised by his father to the rank of prince gained a seat and a vote in the Reichstag also speaks for his growing strength. At this Reichstag, he also made an alliance with
Poland-Lithuania against
Sweden. His empire came to Poland's support during the
Second Northern War. Ferdinand also brought about the royal election of his son
Ferdinand IV, who, however, died in 1654. Because his second son, Leopold, was still too young to be elected as King of the Romans, Ferdinand delayed the opening and the conclusion of the Deputationstag after the Reichstag to gain time until the next election. Finally, Leopold was crowned King of Hungary and Bohemia. In 1656, Ferdinand sent an army into Italy to assist Spain in its struggle with France. ==Death and burial place==