This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
FrederickIVFrederickIV (October 11, 1671 - October 12, 1730) king of Denmark and Norway from 1699.
FrederickIV commanded the Danish troops at the battle of Gadebusch 1712.
Frederick was considered a man of responsibility and industry – often regarded as the most intelligent of all Danish absolute monarchs - and he seems to have possessed the ability of keeping independent of his ministers.
King Frederick William IV of Prussia (October 15, 1795 - January 2, 1861), the eldest son and successor of Frederick William III of Prussia, reigned as King of Prussia from 1840 to 1861.
Frederick William was a staunch Romanticist, and his devotion to this movement, which in the German States featured a nostalgia for the Middle Ages, was largely responsible for him developing into a conservative at an early age.
The modern biography is David E. Barclay, Frederick William IV and the Prussian Monarchy 1840-1861 (Oxford, 1995).