What is Frederick William IV of Prussia?
{{Infobox royalty | name = Frederick William IV | title =King of Prussia | image =FriedrichWilhelmIV.jpg | caption = | reign =4 June 1840 – 2 January 1861 | coronation = | predecessor =[[Frederick William III of Prussia|Frederick William III]] | successor =[[William I, German Emperor|William I]] | spouse =[[Elisabeth Ludovika of Bavaria]] | issue = | royal house =[[House of Hohenzollern]] | royal anthem = | father =[[Frederick William III of Prussia|Frederick William III]] | mother =[[Louise of Mecklenburg-Strelitz]] | birth_date =15 October 1795 | birth_place =Berlin, [[Kingdom of Prussia|Prussia]] | death_date =2 January 1861 (age 65) | death_place =[[Potsdam]] | burial_place=[[Charlottenburg Palace]], Berlin | religion =[[Calvinism]] }} King '''Frederick William IV of Prussia''' ({{lang-de|Friedrich Wilhelm IV. von Preußen}}) (15 October 1795 – 2 January 1861) was the eldest son and successor of [[Frederick William III of Prussia]]. He reigned as [[King of Prussia]] from 1840 to 1861. == Life == Frederick William was educated by private tutors. He served in the army during the War of Liberation against [[Napoleon I of France]] in 1814, but he was not interested in the army. He loved both architecture and landscape gardening and was a patron of several great German artists, such as architect [[Karl Friedrich Schinkel]] and the composer [[Felix Mendelssohn]]. He married Elisabeth Ludovika of Bavaria in 1823, but the couple had no children. Frederick William was a [[Romanticism|Romanticist]], and had a nostalgia for the [[Middle Ages]], therefore he was conservative already at an early age. He was against both liberalisation and unification of Germany and preferred to allow Austria to remain the first power in the German states. In the beginning of his reign he did not continue the reactionary policies of his father, he reduced press censorship and promised a constitution, but he did not want a popular