Guido de Summa (died 1151) was an Italian

Cardinal Cardinal or The Cardinal most commonly refers to * Cardinalidae, a family of North and South American birds **''Cardinalis'', genus of three species in the family Cardinalidae ***Northern cardinal, ''Cardinalis cardinalis'', the common cardinal of ...

. He was born in

Milan Milan ( , , ; ) is a city in northern Italy, regional capital of Lombardy, the largest city in Italy by urban area and the List of cities in Italy, second-most-populous city proper in Italy after Rome. The city proper has a population of nea ...

. Probably he was already a Cardinal-Deacon under Pope Innocent II and as such, he signed

papal bull A papal bull is a type of public decree, letters patent, or charter issued by the pope of the Catholic Church. It is named after the leaden Seal (emblem), seal (''bulla (seal), bulla'') traditionally appended to authenticate it. History Papal ...

s between 12 January 1142 and 9 December 1143. Certainly

Pope Celestine II Pope Celestine II (; died 8 March 1144), born Guido di Castello,Thomas, pg. 91 was head of the Catholic Church and ruler of the Papal States from 26 September 1143 to his death on 8 March 1144. Early life Guido di Castello, possibly the son of ...

named him Cardinal-Priest of S. Lorenzo in Damaso in the consistory celebrated on 17 December 1143. He subscribed the papal bulls as Cardinal-Prest between 28 December 1143 and 6 May 1149 and participated in the papal election, 1144 and papal election, 1145. On 23 September 1149 Eugenius III consecrated him

Bishop of Ostia The Roman Catholic Suburbicarian Diocese of Ostia is an ecclesiastical territory located within the Metropolitan City of Rome in Italy. It is one of the seven suburbicarian dioceses. The incumbent bishop is Cardinal Giovanni Battista Re. For ce ...

; as such, he signed papal bulls from 6 November 1149 until 14 April 1150. For many years he acted as papal legate in Lombardy. He is attested for the last time in the document issued in Ferentino on 10 May 1151.

Bibliography

*Johannes M. Brixius, ''Die Mitglieder des Kardinalkollegiums von 1130-1181'', Berlin 1912, p. 49-50 no. 4 12th-century Italian cardinals Cardinal-bishops of Ostia 1151 deaths Year of birth unknown Clergy from Milan {{Italy-RC-cardinal-stub