He also led the anti-Hohenstaufen party in the region when Frederick's heir, Conrad IV of Germany, incited the Istrian communes to revolt.
•
In 1247 he was sent by Pope Innocent IV to Parma, to lead the city's defense during the imperial siege.
San Gregorio Matese | San Gregorio | Gregorio Fernández | Gregorio Panzani | San Gregorio Magno | Juan Gregorio de las Heras | Gregorio Vargas | Gregorio Marañón | Gregorio Hernandez Rios 'El Goyo' | Gregorio Carafa | San Gregorio d'Ippona | Ryan Gregorio | Manuel Gregorio Acosta | Gregorio Reyes | Gregorio Petrocchini | Gregorio Perfecto High School | Gregorio Perfecto | Gregorio Paz | Gregorio Luperón International Airport | Gregorio Luperón | Gregório Lopes | Gregorio II Boncompagni | Gregorio Di Leo | Colegio de San Gregorio | BRP ''Gregorio del Pilar'' (PF-15) |