Karl Friedrich, Duke of Holstein-Gottorp Stock Photo - Alamy
Karl Friedrich I, Duke of Schleswig-Holstein-Gottorp - Wikidata
Category:Johann Adolf, Duke of Schleswig-Holstein-Sonderburg-Plön - Wikimedia Commons
Portrait of Peter Karl Ulrich, Duke of Holstein-Gottorp, later Tzar Peter III by Georg Khristopher Groot on artnet
Christian Albert, Duke of Holstein Gottorp - Alchetron, the free social encyclopedia
File:Frederick IV (1671-1702), Duke of Holstein-Gottorp, and his spouse Hedvig Sophia (1681–1708).jpg - Wikimedia Commons
John Adolf, Duke of Holstein-Gottorp - Wikipedia
Charles Frederick, Duke of Holstein-Gottorp - Wikipedia
Duke of Holstein-Gottorp - Wikipedia
Frederick III, Duke of Holstein-Gottorp - Wikipedia
Ernest Günther, Duke of Schleswig-Holstein-Sonderburg-Augustenburg - Wikidata
Fredrik III (1597-1659), Duke of Holstein Gottorp and Maria Elisabet (1610-1684), Princess of Saxony — Unknown painters
Charles Frederick, Duke of Holstein-Gottorp - Wikipedia
1700 Karl Friedrich - Charles Frederick, Duke of Holstein-Gottorp - Wikipedia | Charles, Karl, Duke
List of rulers of Schleswig-Holstein - Wikiwand
S-S-I Montross Duke: Production Power to the Third Degree
Frederick IV von Schleswig-Holstein-Gottorp (Holstein-Gottorp, Oldenburg), Herzog (1671 - 1702) - Genealogy
About Frederick III: Duke of Holstein-Gottorp (1597 - 1659) | Biography, Bibliography, Facts, Career, Life
August Philipp, Duke of Schleswig-Holstein-Sonderburg-Beck - Wikiwand
Adolf, Duke of Holstein-Gottorp - Wikipedia
Frederick IV, Duke of Holstein-Gottorp - Wikipedia
Frederick III, Duke of Holstein-Gottorp 1597-1659 | Antique Portrait
Adolf, Duke of Holstein Gottorp - Alchetron, the free social encyclopedia
