Ernest_Günther,_Duke_of_Schleswig-Holstein-Sonderburg-Augustenburg
Ernest Günther I, Duke of Schleswig-Holstein-Sonderburg-Augustenburg
Duke of Schleswig-Holstein-Sonderburg-Augustenburg
Ernest Günther I of Schleswig-Holstein-Sonderburg-Augustenburg (14 October 1609 – 18 January 1689) was a Duke of Schleswig-Holstein of its Sonderburg line.[1] He was the first to have his ducal seat in Augustenborg Palace, which he built and named in honor of his wife.[2] He ruled from 1647 until his death in 1689.[3]