Luca 's decision to side for Emperor Frederick II against Honorius III 's successor , Gregory , gained the family large possessions in the Lazio .
His father , Luca Savelli , was a Roman senator and sacked the Lateran in 1234 .
senator 's decision to side for Emperor Frederick II against Honorius III 's successor , Gregory , gained the family large possessions in the Lazio .
His father , Luca Savelli , was a Roman senator and sacked the Lateran in 1234 .