Prince Alessandro della Torre e Tasso, 1st Duke of Castel Duino, full German name: Alexander Karl Egon Theobald Lamoral Johann Baptist Maria, Prinz von Thurn und Taxis was a member of the Bohemian branch of the princely House of Thurn and Taxis. Alessandro was created Prince della Torre e Tasso and first Duke of Castel Duino by Victor Emmanuel III of Italy after relocating to the Kingdom of Italy in 1923.

The Czech branch of the House of Thurn and Taxis is a dynastic cadet branch of the Princely House of Thurn and Taxis, a German noble family that was a key player in the postal services in Europe in the 16th century and became well known as the owner of breweries and builder of many castles.