Frederick William IV of Prussia

Frederick William IV (German: Friedrich Wilhelm IV.; 15 October 1795 – 2 January 1861), the eldest son and successor of Frederick William III of Prussia, reigned as King of Prussia from 1840 to 1861. Also referred to as the "romanticist on the throne", he is best remembered for the many buildings he had constructed in Berlin and Potsdam, as well as for the completion of the Gothic Cologne cathedral. In politics, he was a conservative, and in 1849 rejected the title of Emperor of the Germans offered by the Frankfurt Parliament as not the Parliament's to give. In 1857, he suffered a stroke and was left incapacitated until his death.

Born to Frederick William III by his wife Queen Louise, he was the latter's favourite son. Frederick William was educated by private tutors, many of whom were experienced civil servants, such as Friedrich Ancillon. He also gained military experience by serving in the Prussian Army during the War of Liberation against Napoleon in 1814, although he was an indifferent soldier. He was a draftsman interested in both architecture and landscape gardening and was a patron of several great German artists, including architect Karl Friedrich Schinkel and composer Felix Mendelssohn. In 1823 he married Elisabeth Ludovika of Bavaria. Since she was a Roman Catholic, the preparations for this marriage included difficult negotiations which ended with her conversion to Lutheranism. There were two wedding ceremonies—one in Munich, and another in Berlin. The couple had a very harmonious marriage, but childless.

Frederick William was a staunch Romanticist, and his devotion to this movement, which in the German States featured nostalgia for the Middle Ages, was largely responsible for his developing into a conservative at an early age. In 1815, when he was only twenty, the crown prince exerted his influence to structure the proposed new constitution of 1815, which was never actually enacted, in such a way that the landed aristocracy would hold the greatest power. He was firmly against the liberalization of Germany and only aspired to unify its many states within what he viewed as a historically legitimate framework, inspired by the ancient laws and customs of the recently dissolved Holy Roman Empire. Frederick William opposed the idea of a unified German state, believing that Austria was divinely ordained to rule over Germany, and contented himself with the title of "Grand General of the Realm".

Frederick William became King of Prussia on the death of his father in 1840. Through a personal union, he also became the sovereign prince of the Principality of Neuchâtel (1840–1857), today part of Switzerland. In 1842, he gave his father's menagerie at Pfaueninsel to the new Berlin Zoo, which opened its gates in 1844 as the first of its kind in Germany. Other projects during his reign—often involving his close collaboration with the architects—included the Alte Nationalgalerie (Old National Gallery) and the Neues Museum in Berlin, the Orangerieschloss at Potsdam as well as the reconstruction of Schloss Stolzenfels on the Rhine (Prussian since 1815) and Burg Hohenzollern, in the ancestral homelands of the dynasty which became part of Prussia in 1850.

Although a staunch conservative, Frederick William did not seek to be a despot, and so he toned down the reactionary policies pursued by his father, easing press censorship and promising to enact a constitution at some point, but he refused to create an elected legislative assembly, preferring to work with the nobility through "united committees" of the provincial estates. Despite being a devout Lutheran, his Romantic leanings led him to settle the Cologne church conflict by releasing the imprisoned Clemens August von Droste-Vischering, the Archbishop of Cologne. He also patronized further construction of Cologne Cathedral, Cologne having become part of Prussia in 1815. In 1844, he attended the celebrations marking the completion of the cathedral, becoming the first king of Prussia to enter a Roman Catholic building. When he finally called a national assembly in 1847, it was not a representative body, but rather a United Diet comprising all the provincial estates, which had the right to levy taxes and take out loans, but no right to meet at regular intervals.

Silver Coin of Frederick William IV, struck 1860
Obverse (German): FRIEDR[ICH] WILHELM IV KOENIG V PREUSSEN, or in English, "Frederick William IV, King of Prussia"	Reverse (German): EIN VEREINSTHALER XXX EIN PFUND FEIN 1860, or in English, "One Double Thaler 30 to the Fine Pound"

When revolution broke out in Prussia in March 1848, part of the larger series of Revolutions of 1848, the king initially moved to repress it with the army, but on 19 March he decided to recall the troops and place himself at the head of the movement. He committed himself to German unification, formed a liberal government, convened a national assembly, and ordered that a constitution be drawn up. Once his position was more secure again, however, he quickly had the army reoccupy Berlin and in December dissolved the assembly. He did, however, remain dedicated to unification for a time, leading the Frankfurt Parliament to offer him the crown of Germany on 3 April 1849, which he refused, purportedly saying that he would not accept "a crown from the gutter". The King's refusal was rooted in his Romantic aspiration to re-establish the medieval Holy Roman Empire, comprising smaller, semi-sovereign monarchies under the limited authority of a Habsburg emperor. Therefore, Frederick William would only accept the imperial crown after being elected by the German princes, as per the former empire's ancient customs. He expressed this sentiment in a letter to his sister the Empress Alexandra Feodorovna of Russia, in which he said the Frankfurt Parliament had overlooked that "in order to give, you would first of all have to be in possession of something that can be given." In the king's eyes, only a reconstituted College of Electors could possess such authority. With the failed attempt by the Frankfurt Parliament to include the Habsburgs into a newly unified German Empire, the Parliament turned to Prussia. Seeing Austrian ambivalence towards Prussia taking a more powerful role in German affairs, Frederick William began considering a Prussian-led union. All German states, excluding those of the Habsburgs, would be unified under Hohenzollern authority, and these two polities would be linked in an overarching political framework. Frederick William, therefore, did attempt to establish the Erfurt Union, a union of the German states except for Austria, but abandoned the idea by the Punctation of Olmütz on 29 November 1850, in the face of renewed Austrian and Russian resistance. The German Confederation remained the common government of German Europe.

The crypt containing the Sarcophagi of Frederick William IV and his wife Elisabeth Ludovika of Bavaria in the Church of Peace, Sanssouci Park in Potsdam

Rather than returning to bureaucratic rule after dismissing the Prussian National Assembly, Frederick William promulgated a new constitution that created a Parliament of Prussia with two chambers, an aristocratic upper house and an elected lower house. The lower house was elected by all taxpayers, but in a three-tiered system based on the amount of taxes paid, so that true universal suffrage was denied. The constitution also reserved to the king the power of appointing all ministers, reestablished the conservative district assemblies and provincial diets, and guaranteed that the civil service and the military remained firmly in the hands of the king. This was a more liberal system than had existed in Prussia before 1848, but it was still a conservative system of government in which the monarch, the aristocracy, and the military retained most of the power. This constitution remained in effect until the dissolution of the Prussian kingdom in 1918.

Following the revolutions of 1848, the increasingly gloomy king withdrew from the public eye, surrounding himself with advisers who preached absolute orthodoxy and conservatism in religious and political matters. A stroke in 1857 left the king partially paralyzed and largely mentally incapacitated, and his brother (and heir-presumptive) William served as regent from 1858 until the king's death in 1861, at which point the regent acceded to the throne as William I of Prussia.

Frederick William IV is buried with his wife in the crypt underneath the Church of Peace in the park of Sanssouci, at Potsdam.

Frederick William IV of Prussia was a Lutheran member of the Evangelical State Church of Prussia. It was a United Protestant denomination, bringing together Reformed and Lutheran believers.