In 1955 he returned to Austria. He inherited the Carlist pretensions to the Spanish throne of his brother Archduke Karl Pius and called himself Duke of Madrid.
Filippo Maria Visconti Duke of Milan acknowledged "d. Jaches militem, Johannem et Franciscum fratres de la Mirandula" as his "fideles adherentes…eorum castra et terras Mirandule et Concordie" by charter dated 13 Oct 1420 [4] . Conte di…