Joannes Dominicus Mansi, Sacrorum Conciliorum nova et amplissima Collectio Tomus vicesimus-sextus (Venetiis: Apud Antonium Zatta 1784), columns 1239-1240 :
Sequuntur praelati, ambassiatores et procuratores, seu eorum nomina, qui in hoc sacro concilio Pisano comparuerunt et fuerunt, quod concilium tentum et celebratum fuit an. MCDIX, computando secundum morem curiae Romanae, et incepit die XXV. Martii.
Et primo reverendissimi in Christo patres et domini domini sacrosanctae Romanae Ecclesiae Cardinales:
See the "Observatio" at column 1256, correcting the mistakes of Raynaldi. And see another list, Mansi, Sacrorum Conciliorum nova et amplissima collectio Volume 27, 331 ff.
Cardinal Henricus (Enrico Minutoli), Bishop of Tusculum, arrived on September 14, 1408.
Cardinal Angelo d'Anna de Sommariva, O.Camald., of the title of S. Pudenziana, arrived on September 14, 1408.
Antonius Calvus, of the title of S. Prassede (Tudertinus) arrived on June 16, 1409.
A similar list of twenty-two cardinals who participated in the Council of Pisa is provided by Jacques Lenfant, Histoire du Concile de Pise I (Amsterdam 1724), 350-351. He adds separately Cardinal Angelo Acciaolo, who died at Pisa on May 31, 1408, before the Council opened; Cardinal Antonio Calvi of S. Prassede, who arrived on June 16, 1409; and Cardinal Antoine de Chalant, who joined the Council on June 10, 1409. That actually makes a list of twenty-four participants.
Martin Souchon, Die Papstwahlen in der Zeit des grossen Schismas II (Braunschweig 1899), pp. 41-42, points out that there existed twenty-six living cardinals on the day of the opening of the Council of Pisa, March 25, 1409. Of these twenty-six, four were still loyal to Gregory XII (Antonio Calvi) or to Benedict XIII (Jean Flandrin, Ludovico Fieschi and Antoine Challant) [Religieux de Saint-Denys XXX. 2, p. 212 ed. Bellaguet]. On the opening day, only sixteen cardinals were present: nine Italians and seven French (cf. Religieux de Saint-Denys, XXX. 2, p. 208 ed. Bellaguet). Cardinal Caraccioli arrived from Bologna on April 2; Cardinal Maramaldo from Bohemia on April 4; Migliorati from Bologna on April 5; Uguccione from England on April 30; Fernandez from Spain on May 2, joining the Council on May 22; Chaillant from Savoy on June 7, joining the Council on June 10; Calvi arrived late for the Conclave on June 16; Baldassare Cossa was apparently not at the opening of the Conclave that elected Alexander V, but arrived on June 15 (Souchon, p. 42 n.). Fieschi did not appear at all until the end of 1409.
©2011 John Paul Adams, CSUN