Prince Alessandro della Torre e Tasso, 1st Duke of Castel Duino,[2] full German name: Alexander Karl Egon Theobald Lamoral Johann Baptist Maria, Prinz von Thurn und Taxis (8 July 1881 in Schloss Mzell, Mzell, Kingdom of Bohemia, Austria-Hungary – 11 March 1937 in Castel Duino, Duino, Kingdom of Italy) was a member of the Bohemian branch of the princely House of Thurn and Taxis.

[3] Alessandro was the third child and son of Prince Alexander Johann of Thurn and Taxis and his wife Princess Marie of Hohenlohe-Waldenburg-Schillingsfürst.

[citation needed] He was a great-great-great-grandson of Alexander Ferdinand, 3rd Prince of Thurn and Taxis.

[citation needed] In 1932, in Vrana, Alessandro married American heiress Helena "Ella" Holbrook Walker.

[2] Ella lived many years beyond her husband's death in 1937, and worked on the upkeep of the family's property, Villa Serbelloni at Bellagio, Lombardy, Italy, and left it to the Rockefeller Foundation in her will.