mother, the Empress Catherine I of Russia. His attempt failed, but his son by Duchess Anna Petrovna, Charles Peter Ulrich (who - as Duke of Holstein-Gottorp - succeeded in the ducal share of Holstein in 1739), eventually became Russian tsar in 1762, as Peter III. Charles Frederick and Anna left for Gottorp ducal share of Holstein in 1727, taking residence in Kiel Castle, where Anna died following the birth of their son in 1728. Charles Frederick spent the rest of his life in Holstein-Gottorp at Kiel. His prime concern was to secure his son's succession to the Russian throne. He did support his followers in Sweden also, but did not pay much attention to Holstein-Gottorp. Before a member of the family of Holstein-Gottorp was to sit on either the Swedish or the Russian throne, Duke Charles Frederick died in 1739 in the Saxon village of Rolfshagen. His grave is in the Cloister Church at Bordesholm. Ancestors References Carl Frederick 1700 Dukes of Holstein-Gottorp Holstein-Gottorp, Karl Friedrich of Holstein-Gottorp, Karl Friedrich of Charles Frederick, Duke of Schleswig Disinherited European royalty Members of the Supreme Privy Council