He is not named as one of the cardinals who was taken prisoner, along with Pope Paschal, on 12 February 1111, or made to swear the oath in the name of the pope to accept the agreement with King Henry V.[5] He was one of the cardinals who condemned the "Privilegium"[6] granted by Pope Paschal II to King Henry at the Lateran synod of March 1112.[7]
On 12 April 1118, Roscemann was in Capua with the papal court, and signed a document.[9] In July, the pope and the court returned to Rome, but the pressure of the antipope and the Frangipani compelled them to flee again, on 2 September 1118. The pope and six cardinals, including Rosceman, took ship for Pisa.[10] There is no evidence for any activity of Roscemann at Pisa.[11]
He is said to have participated in the papal election at Cluny on 2 February 1119,[12] according to Petrus Diaconus.[13]
In 1120, during his visit to Benevento, Pope Calixtus II removed Stephanus, the Rector of Benevento, who had succeeded Cardinal Hugo d' Alatri,[14] and replaced him with the Deacon Roscemannus.[15] He served until 1122.[16]
His latest known subscription to a papal document was on 4 September 1128 in Benevento.[17]
^Ciaconius (Alfonso Chacón), in: Vitae et res gestae Pontificum romanorum et S.R.E. Cardinalium second ed. (ed. Augustinus Olduin) Tomus I (Rome: Filippo and Antonio Rossi 1677), p. 922, says that Roscemann had the surname "Sanseverino", and that he was descended from the Counts of the Marsi. There is no evidence for the assertion.
^Hüls, p. 227, with note 1. Falco of Benevento, "Chronicon" in: Lodovico Antonio Muratori (ed.), Rerum Italicarum Scriptores Tomus quintus (Milan: Typographia Societatis Palatinae In Regia Curia, 1724), p. 96.
^Klaus Ganzer (1963), Die Entwicklung des auswärtigen Kardinaläts im hohen Mittelalter.(in German) Tübingen: Max Niemeyer 1963, p. 75: "Das Datum der Kreation laẞt sich nicht genau bestimmen."
^Gregorovius IV. 2, pp. 344-351. Watterich II, p. 65.
^The "privilege" granted the emperor the right to invest a newly elected bishop with the ring and the staff of office before he was consecrated by the appropriate church officials. Pertz, Monumenta Germaniae historica. Legum. Tomus I, pp. 144-145, no. 96.
^Cf. Hüls, p. 227.; cf. Lodovico Antonio Muratori (ed.), Rerum Italicarum Scriptores Tomus tertius, pars prima (Milan: Typographia Societatis Palatinae In Regia Curia, 1723), pp. 398-413.
^Petrus Diaconus, Chronicon Casinense IV. 64, in: Monumenta Germaniae Historica Scriptorum Tomus VII, p. 793; J. -P. Migne (ed.), Patrologiae Latinae Tomus CLXXIII (Paris 1847), pp. 173, 886.
^Uta-Renate Blumenthal, "Die Chronik von Montecassino. Chronica Monasterii Casinensis, by Hartmut Hoffmann [review]," The Catholic Historical Review, Vol. 70, No. 1 (Jan., 1984), pp. 142-145, at p. 143: "Peter's chief claim to fame was his activity as forger who, in the formulation of Wilhelm Smidt, did not have his equal during all of the Middle Ages." E. Caspar, Petrus Diaconus und die Montecassinenser Fälschungen (Berlin: Springer 1909), pp. 177-184.
^Hüls, p. 227, with note 1. P. F. Kehr, Italia Pontificia VIII (Berlin: Weidmann 1935), p. 165, no. 189. Falco of Benevento, "Chronicon" in: Lodovico Antonio Muratori (ed.), Rerum Italicarum Scriptores Tomus quintus (Milan: Typographia Societatis Palatinae In Regia Curia, 1724), p. 96. Stefano Borgia, Memorie historiche della pontifizia città di Benevento Parte Terza, Volume 1 (Roma: Salomoni 1769), p. 55-61, who notes his successor, Crescenzio, in 1125.
Hüls, Rudolf (1977). Kardinäle, Klerus und Kirchen Roms: 1049–1130 (in German). Bibliothek des Deutschen Historischen Instituts in Rom. ISBN978-3-484-80071-7.
Klewitz, Hans-Walter (1957). Reformpapsttum und Kardinalkolleg. Die Entstehung des Kardinalkollegiums. Studien über die Wiederherstellung der römischen Kirche in Süditalien durch das Reformpapsttum. Das Ende des Reformpapsttums (in German). Hermann Gentner Verlag, Darmstadt.
