The New International Encyclopædia/Frederick William I. (Hesse)
FREDERICK WILLIAM I. (1802-75). Elector of Hesse. He was educated at Marburg and Leipzig, and became co-regent in 1831, and Elector in 1847. He sided with Austria during the War of 1866, and his refusal to accede to the terms of Prussia led to the invasion of his territory. In consequence of his obstinate refusal to treat with the Prussian Government, he was arrested and conveyed to the fortress of Stettin, and his territories were annexed by Prussia.