Excellent point, but I must correct an error. Emperor Franz Josef (1830-1916) was not murdered; he died in bed of old age. His successor, Bl. Emperor Karl (1887-1922), was deposed in 1918 but died of natural causes (albeit prematurely) four years later.
Perhaps you were thinking of Franz Josef's nephew, Archduke Franz Ferdinand, whose assassination in 1914 provoked World War I.
Franz Josef's wife Empress Elisabeth was murdered in 1898; his brother Maximilian was executed in Mexico in 1867. But the old emperor himself remained safe.
Thank you. I conflated Archduke Franz Ferdinand with the Emperor.
Sorry for the hasty post.