Guillermo I de Alemania (en alemán, Wilhelm I; Berlín, 22 de marzo de 1797 - ib., 9 de marzo de 1888) fue rey de Prusia, desde el 2 de enero de 1861 y el primer emperador alemán desde el 18 de enero de 1871 hasta su fallecimiento.
Prince Frederick William of Hesse-Kassel was born in Copenhagen on 26 November 1820. He moved to Denmark with his family at the age of three, and grew up there. He attended the university in Bonn, and then began a military career. In 1843 he was third in line for the Danish throne after the King's son and brother, Prince Ferdinand.
Príncipe heredero. El príncipe Alejandro de Dinamarca nació en el Reino Unido en 1903, hijo de los entonces príncipes Carlos de Dinamarca y Maud de Gales.Por vía paterna, era nieto del rey Federico VIII de Dinamarca, y por la parte materna, del rey Eduardo VII del Reino Unido.
William ceased his active service in the Royal Navy in 1790. When Britain declared war on France in 1793, he was eager to serve his country and expected to be given a command but was not, perhaps at first because he had broken his arm by falling down some stairs drunk, but later perhaps because he gave a speech in the House of Lords opposing the war.
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