Watterich II, pp. 187-188, from: Historia Compostelana III. 23, from a letter of Cardinal Pietro of S. Susanna: "Obeunte itaque papa IV feria post datas cineres circa solis occasum, ostia omnia clausa sunt, et nullus cardinalium est ad eum entrare permissus." Henrique Florez, Espana Sagrada Vol. XX (Madrid: E. Sanchez 1765), p. 515.
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Stefano Borgia, Memorie della pontifizia città di Benevento(in Italian)Parte III, volume 1 (Roma: Salomon 1769), p. 35.
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.
Hüls, p. 122, with note 8. Charles Joseph Hefele, Histoire des conciles, second edition, Tome V (Paris: Letouzey 1912), pp. 532-535. J. D. Mansi (ed.), Sacrorum Conciliorum nova et amplissima collectio, editio novissima, Tomus XXI(in Latin) (Venice: A. Zatta 1776), p. 52.