In 1241 Adelasia, heiress of Gallura and Logudoro, was married as her third husband to Enzio, the natural son of Frederick II., who received the title of king of Sardinia from his father, but fell into the hands of the Bolognese in 1249, and 3 Three inscriptions of the middle of this century, set up by the iipXcov Zap8'vias with the title protospatarius, are illustrated by A.
Next year Bologna rose against him, defeated his troops and took his son Enzio, king of Sardinia, prisoner at Fossaita.
Enzio died in his prison foul years later.
And against the neighbouring cities of Romagna and Emilia; indeed, in 1249 the Bolognese took Enzio, the emperor's son, prisoner, and kept him in confinement for the rest of his life.
The pope had become alarmed when the emperor brought about a marriage between the heiress of Sardinia, Adelasia, and his natural son Enzio, who afterwards assumed the title of king of Sardinia.
A number of ecclesiastics proceeding to a council called by Gregory were captured by Enzio at the seafight of Meloria, and the emperor was about to undertake the siege of Rome, when the pope died (August 1241).
In Italy, during the emperor's absence, his cause had been upheld by Enzio and by the ferocious Eccelino da Romano.
Frederick left several illegitimate children: Enzio has already been referred to; Frederick, who was made the imperial vicar in Tuscany; and Manfred, his son by the beloved Bianca Lancia or Lanzia, who was legitimatized just before his father's death,and was appointed by his will prince of Tarento and regent of Sicily.