The house, Villa Cargnacco, had belonged to the German art historian of the Italian Renaissance Henry Thode, from whom it was confiscated by the Italian state, including artworks, a collection of books, and a piano which had belonged to Liszt. [1][2] d'Annunzio rented it in February 1921 and within a year reconstruction started under the guidance of architect Giancarlo Maroni. Due to d'Annunzio's popularity and his disagreement with the fascist government on several issues, such as the alliance with Nazi Germany, the fascists did what they could to please d'Annunzio in order to keep him away from political life in Rome. Part of their strategy was to make huge funds available to expand the property, to construct and/or modify buildings, and to create the impressive art and literature collection. In 1924 the airplane that d'Annunzio used for his pamphleteering run over Vienna during World War I was brought to the estate, followed in 1925 by the MAS naval vessel used by him to taunt the Austrians in 1918 in the Beffa di Buccari. In the same year the bow section of the protected cruiser Puglia was hauled up the hill and placed in the woods behind the house, and the property was expanded by acquisition of surrounding lands and buildings.

In 1926 the government donated an amount of 10 million lire, which allowed a considerable enlargement of the Villa, with a new wing named the Schifamondo. In 1931 construction was started on the Parlaggio, the name for the amphitheatre. The mausoleum was designed after d'Annunzio's death but not actually built until 1955, and d'Annunzio's remains were finally brought there in 1963.