On 28 February 1886 at Vienna, Charles Stephen married Archduchess Maria Theresia, Princess of Tuscany (Brandeis-Altbunzlau (Brandýs nad Labem-Stará Boleslav), 18 September 1862–Castle of Saybusch (Żywiec), 10 May 1933).

[1] She was the daughter of Archduke Karl Salvator of Austria, Prince of Tuscany and his wife Princess Maria Immaculata of Bourbon-Two Sicilies.

Appointed his naval governor in 1879 was Fregattenkapitän (later admiral) Hermann von Spaun, who accompanied him on a voyage to Brazil and North America in the goelette Saida.

Others, however, had effective control of operations in 1914–1918; Anton Haus, Maximilian Njegovan and Miklós Horthy each served in turn as Flottenkommandant (Fleet Commander).

[3] Charles Stephen was an officer à la suite of the Imperial German Navy and proprietary head of the 8th Austrian Infantry Regiment.

[11] His yacht Waturus was sold to Randal Morgan of Philadelphia in June 1902,[12] and went on to have a long career in both naval and civilian service as Hochelaga.

When Charles Stephen's uncle Archduke Albert, Duke of Teschen died in 1895, he and his brothers each inherited large estates.

[24] After 1918, Charles Stephen acquired Polish citizenship and continued to live in Żywiec, which had passed to the sovereignty of the Second Republic of Poland.