In 1249 , he was captured by his enemies and imprisoned in Bologna , where he died 26 years later .
Enzo of Logudoro Hohenstaufen , 1238 -- 1245 , was the illegitimate son of Emperor Frederick II and was appointed by his father .
In 1249 , Enzo was captured by Enzo 's enemies and imprisoned in Bologna , where he died 26 years later .
Enzo of Logudoro Hohenstaufen , 1238 -- 1245 , was the illegitimate son of Emperor Frederick II and was appointed by his father .