Who married Archduke Franz Karl of Austria?

Archduke Franz Karl Joseph of Austria (17 December 1802 – 8 March 1878) was a member of the House of Habsburg-Lorraine. He was the father of two emperors: Franz Joseph I of Austria and Maximilian I of Mexico. Through his third son Karl Ludwig, he was the grandfather of Archduke Franz Ferdinand of Austria – whose assassination sparked the hostilities that led to the outbreak of World War I.

Princess Sophie of Bavaria (Sophie Friederike Dorothea Wilhelmine; 27 January 1805 – 28 May 1872) was the daughter of King Maximilian I Joseph of Bavaria and his second wife, Caroline of Baden. The identical twin sister of Queen Maria Anna of Saxony, Sophie became Archduchess of Austria by marriage to Archduke Franz Karl of Austria. Her eldest son, Franz Joseph, reigned as Emperor of Austria and King of Hungary; her second son, Maximilian, briefly reigned as Emperor of Mexico.