Giovanni Visconti was, according to Lorenzo Cardella, nephew of
Pope Gregory X. He was ostensibly created
cardinal-bishop of Sabina
A cardinal ( la, Sanctae Romanae Ecclesiae cardinalis, literally 'cardinal of the Holy Roman Church') is a senior member of the clergy of the Catholic Church. Cardinals are created by the ruling pope and typically hold the title for life. Col ...
by his uncle in 1275 and in 1276 was named judge in the case concerning the translation of bishop Giovanni of Potenza to the archbishopric of Monreale, postulated by the cathedral chapter of Monreale. He died in 1277 or 1278.
The modern scholars have concluded that no such cardinal existed in 13th century because the suburbicarian see of Sabina was occupied by
Bertrand de Saint-Martin
Bertrand de Saint-Martin (died 28 or 29 March 1278) was a French cardinal.
He was born in Arles.
Career in the Church
He entered the Order of Benedictines and by 1238 was dean of the abbey of Saint-André de Villeneuve at Avignon. In 1248 he ...
from 1273 until at least 1277. The document of
Pope John XXI concerning the postulation of bishop Giovanni of Potenza to the see of Monreale actually refers to cardinal Bertrand and even explicitly calls him by name.
[Stapper, pp. 35-36 not. 3.]
Notes
Sources
The Cardinals of the Holy Roman Church*
Konrad Eubel
Konrad Eubel or Conradus Eubel (19 January 1842 – 5 February 1923) was a German Franciscan historian. He is known for his reference work, the ''Hierarchia Catholica Medii Aevi'', on medieval popes, cardinals and bishops. It appeared in thre ...
: ''Hierarchia Catholica Medii Aevi'', vol. 1, Münster 1913
* Richard Stapper: ''Papst Johannes XXI'', Kirchengeschichtliche Studien, Münster 1898
* Richard Sternfeld, ''Der Kardinal Johann Gaetan Orsini (Papst Nikolaus III.) 1244-1277'', Berlin 1905
* Lorenzo Cardella: ''Memorie storiche de' cardinali della Santa Romana Chiesa'', vol. 2, Rome 1793
13th-century Italian cardinals
Giovanni Giovanni may refer to:
* Giovanni (name), an Italian male given name and surname
* Giovanni (meteorology), a Web interface for users to analyze NASA's gridded data
* ''Don Giovanni'', a 1787 opera by Wolfgang Amadeus Mozart, based on the legend of ...
Cardinal-nephews
{{Italy-RC-cardinal-stub