Question: Who is Archduke Carl Christian Of Austria's paternal grandfather?
Sentence (from "Archduke Carl Ludwig of Austria (1918–2007)"): Michael Gabriel Antonius Robert Stephan Pius Gregor Ignatius Markus d'Aviano; 10 March 1918 – 11 December 2007), also known as Carl Ludwig Habsburg-Lothringen, was the fifth child of Charles I of Austria and Princess Zita of Bourbon-Parma.
Relevant evidence: Yes