Archduke Otto of Austria (1865–1906)

Otto was a son of Archduke Karl Ludwig of Austria and his wife, Princess Maria Annunciata of Bourbon-Two Sicilies. Otto's father, Karl Ludwig, was a younger brother of Emperor Franz Joseph I of Austria; and Karl Ludwig became heir presumptive to the Austro-Hungarian throne when his cousin Crown Prince Rudolf committed suicide in 1889. Although a newspaper account claimed that Karl Ludwig renounced his rights to the throne that same year (1889) in favour of his eldest son, Franz Ferdinand, that story is not certain.

On the death of Karl Ludwig in May 1896, Otto's brother Franz Ferdinand did indeed become heir presumptive to the Austro-Hungarian throne. At the time of their father's death, Franz Ferdinand had been ill with tuberculosis and there was speculation that Franz Ferdinand would renounce his rights, which would have made his brother, Otto, heir presumptive. However, this did not happen, and Otto was never first in line to the throne.

In 1914, Franz Ferdinand was assassinated by the Serbian nationalist terrorist Gavrilo Princip in Sarajevo, and Otto's son Charles became heir presumptive. Charles inherited the throne two years later.

Archduke Otto in 1870

Otto's mother died when he was six years old. Otto and his elder brother Franz Ferdinand were taught by Alfred Ludwig, Baron of Degenfeld. Otto was not interested in learning and often played pranks on his teachers. Nevertheless, his teachers preferred the cheerful Otto more than his grumpy and irascible older brother. He was also his father's favourite, which led to a challenging relationship with his brother.[1]^{: p. 58–61}

Otto had a reputation as a loafer and was often involved in scandals. In one instance, he was known to have jumped nude from a private dining room in the Hotel Sacher in front of a visiting British peeress.[2] He is also widely remembered for the widely circulated story that he had been spotted in a hallway at the same hotel, about to enter a lady's room, wearing nothing else but a sword. He was gradually alienated from the imperial court, and eventually even his wife distanced herself from him.

Around 1900, he contracted syphilis. This caused him agonizing pain for the last two years of his life. He withdrew from public life and spent a year in Egypt, where he found temporary reprieve. He returned to Austria, where he fell ill again. The last few months of his life, he lived in a villa in the Viennese suburb Währing. He was forced to replace his nose with a rubber prosthetic due to facial deformity.[2] He was seriously ill, and was nursed by his last mistress, Louise Robinson, using the pseudonym Sister Martha, and by his stepmother Infanta Maria Theresa of Portugal. He died on 1 November 1906, in the presence of his spiritual adviser, Godfried Marschall (de), the auxiliary bishop of Vienna.[3]