Sicilian feeling was first shown in the support given to the luckless expedition of Conradin in 1268.
Invited by Sicilian malcontents and Ghibellines, Conradin (Ital.
Von Juvalt, Forschungen uber die Feudalzeit im Curischen Raetien, 2 parts (Zurich, 1871); C. Kind, Die Reformation in den Bisthumern Chur and Como (Coire, 1858); Conradin von Moor, Geschichte von Curraetien (2 vols., Coire, 1870-1874); P. C. von Planta, Das alte Raetien (Berlin, 1872); Idem, Die Curraetischen Herrschaften in der Feudalzeit (Bern, 1881); Idem, Verfassungsgeschichte der Stadt Cur im Mittelalter (Coire, 1879); Idem, Geschichte von Graubunden (Bern, 1892).
The medieval castle of the Frangipani, in which Conradin of Swabia vainly sought refuge after the battle of Tagliacozza in 1268, is built upon the foundations of a very large villa, of opus reticulatum with later additions in brickwork, and with a small harbour attached to it on the south-east.
Although the picturesque figures of Manfred and Conradin awakened sympathy among the people of the kingdom, their authority was never really consolidated and their German knights were hated; which facts rendered the enterprise of another foreigner like the Angevin comparatively easy.
When Conradin was executed in 1268 Louis inherited his lands in Germany, sharing them with his brother Henry.
He was the uncle and guardian of Conradin of Hohenstaufen, whom he assisted to make his journey to Italy in 1267, and accompanied as far as Verona.
Regained for the Hohenstaufen by Henry's son, Frederick II., in 1214, the German kingdom passed to his son, Conrad IV., and when Conrad's son Conradin was beheaded in Italy in 1268, the male line of the Hohenstaufen became extinct.
A battle took place at Tagliacozzo (August 23rd, 1268), in which the Imperialists were defeated, and Conradin himself was subsequently caught and handed over to Charles, who had him tried for high treason and beheaded (see Conradin).
Escaping from the field of battle Conradin reached Rome, but acting on advice to leave the city he reached Astura, where he was seized and handed over to Charles of Anjou.