Conversation so far:
who was Franz Joseph I of Austria's mother?
Princess Sophie of Bavaria
was Franz Joseph I of Austria married?
Franz Joseph I of Austria married Empress Elisabeth of Austria
did Franz Joseph I of Austria produce heirs with Sophie Duchess of Hohenberg?
their first daughter Sophie died as an infant, and their only son Rudolf died by suicide in 1889
were there any other children b?y Franz Joseph I of austria and Sophie Duchess of Hohenberg?

Question: Are there any other interesting aspects about this article?
Self-contained rewrite: Are there any other interesting aspects about the Franz Joseph I of Austria article?