Summa, c. 1253. The manuscripts reflect three stages of development, in one of which the Quaestio (Text 5) is not inserted or attached, in one the Quaestio is attached at the end (cf. the list provided by M. Bertram, BMCL 16 (1986) 96–97), and in one the Quaestio is inserted under the title De sententia excommunicationis. All printed editions seem to reflect this last version.

Lectura on the Novellae I–II of Innocent IV.

Lectura on the Decretales Gregorii noni.

Decretum electionis, after 1253.

Quaestio, post 1261. written by Hostiensis while he was at the Roman curia, upon a request from the University of Bologna (after 1261).

Summa, c. 1253.

Earlest Version (without Quaestio)

München, BSB Clm 14006

München, BSB Clm 15707

Paris, Bibl. Sainte-Geneviève 328

Second Version (with Quaestio appended at end)

a266Txt1Amiens, BM 360 (13th c.)

a266Txt1Arras, BM 582 (13/14th c.)

a266Txt1Bremen, Staats- u. Universitätsbibl. a.139 (13th c.)

a266Txt1Chartres, BM 322 (360) (14th c.)

a266Txt1Bernkastel-Kues, Bibl. St. Nikolaus Hospitals 259 (13/14th c.)

a266Txt1Frankfurt am Main, Stadt- und Universitätsbibl. 8 (14th c.)

a266Txt1Kassel, Universitäts- u. Landesbibl. 2° iurid. 6 (14th c.)

a266Txt1London, BL Royal 10 D IV (14th c.)

a266Txt1London, BL Royal 10 E VIII (14th c.)

a266Txt1Mons, Bibl. Cen. 38/354 (14th c.)

a266Txt1Montefano, Bibl. S. Silvestro Cod. 12 (13th c.)

a266Txt1München, BSB Clm 28160 (14th c.)

a266Txt1London, BL Cent. II 64 (13th c.)

a266Txt1Olomouc, Státni Archiv C.O. 204 (14th c.)

a266Txt1Paris, BN lat. 4000 (14th c.)

Paris, Bibl. Sainte-Geneviève 328

Paris, Bibl. Sainte-Geneviève 329

a266Txt1Reims, BM 713 (14th c.)

a266Txt1Rouen, BM 745 (14th c.)

a266Txt1Saint-Omer, BM 199 (13th c.)

a266Txt1Saint-Omer, BM 461 (14th c.)

a266Txt1Schlägl, Stiftsbibl. 458.3 (Kat. Nr. 15) (14th c.)

a266Txt1Siena, BC G.IV.16 (13th c.)

a266Txt1Troyes, BM 97 (13th c.)

a266Txt1Troyes, BM 98 (13/14th c.)

a266Txt1Venezia, BN lat. 2651 (13/14th c.)

Venezia, BN lat. 2127

a266Txt1Città del Vaticano, BAV Arch. Cap. S. Pietro C.112 (14th c.)

a266Txt1Città del Vaticano, BAV Vat. lat. 2314 (14th c.)

Third Version (with Quaestio inserted)

München, BSB Clm 24

Lectura on the Novellae I–II of Innocent IV.

a266Txt2Arras, BM 797 (449), 184r–206r (This manuscript has two volumes. The Novellae commentary is in the second.)

a266Txt2Bamberg, Staatsbibl. Can. 56 (P.III.9), fols. 272–325 (In the fourth volume of the manuscript.)

Basel, Universitätsbibl. C.I.18, fols. 1r–26r

a266Txt2Cambrai, BM 615, fols. 260v–270r (The first section of commentary following a first volume of Hostiensis’s Lectura on the Liber Extra.)

a266Txt2Cambrai, BM 616, fols. 282r–299v (The second section of commentary following a second volume of Hostiensis’s Lectura on the Liber Extra.)

a266Txt2Cambrai, BM 617, fols. 222r–228r (The third section of commentary following a third volume of Hostiensis’s Lectura on the Liber Extra.)

a266Txt2Cambrai, BM 618, fols. 234v–246r (The fourth section of commentary following a fourth volume of Hostiensis’s Lectura on the Liber Extra.)

a266Txt2Chartres, BM 264 (305), fols. ?–489r (In the second volume of the manuscript.)

Darmstadt, Landesbibl. 853, fols. 96r–127r

El Escorial, Bibl. San Lorenzo V.I.3, fols. 302–327?

Firenze, Bibl. Laurenz. Fesul. 117, fols. 284r–303v

London, BL Royal 10.E.VI, fols. 231r–256r

Nürnberg, Stadtbibl. I 24, fols. 260r–284v

Paris, Bibl. Mazarine 1314, fols. 404r–448v

a266Txt2Paris, BN lat. 3996, fols. 189rv, 183v–188v, 190r (Only covers Nov. 1–6 and 8–11.)

a266Txt2Reims, BM 716, fols. 349v–366v (Only covers Nov. 1–6, 8–22, and 25–27.)

Toledo, Bibl. Catedral 20–18, fols. 192r–241v

Toledo, Bibl. Catedral 28–8, fols. 349r–?

Valencia, Bibl. Catedral 33 (217), fols. ?–240v?

Valencia, Bibl. Catedral 308, fols. 1–73v

Città del Vaticano, BAV Vat. lat. 2545, fols. 260r–282v

Città del Vaticano, BAV Vat. lat. 2546, fols. 206r–236v

Vendôme, BM 83, fols. 245–267?

Wien, ÖNB 2184, fols. 46v–104r

Lectura on the Decretales Gregorii noni.

First Recension (c.1254–65)

Oxford, New Coll. 205, fol. 2r–241r

Second Recension

a266Txt3Arras, BM 797 (49) (2 volumes; complete)

a266Txt3Bamberg, Staatsbibl. Can. 56 (P.III.6–9) (4 volumes; complete)

a266Txt3Chartres, BM 264 (305) (2 volumes; complete)

a266Txt3Cambrai, BM 615 (first of four volumes (MSS 615–618); complete)

a266Txt3Cambrai, BM 616 (second of four volumes (MSS 615–618); complete)

a266Txt3Cambrai, BM 617 (third of four volumes (MSS 615–618); complete)

a266Txt3Cambrai, BM 618 (fourth of four volumes (MSS 615–618); complete)

a266Txt3Durham, Cath. Libr. C II 7 (first of two volumes (other volume is C II 8); complete)

a266Txt3Durham, Cath. Libr. C II 8 (second of two volumes (other volume is C II 7); complete)

a266Txt3London, BL Royal 10.E.V (first of two volumes (other volume is 10.E.VI); complete)

a266Txt3London, BL Royal 10.E.VI (second of two volumes (other volume is 10.E.V); complete)

a266Txt3London, BL Arundel 485 (first of two volumes (other volume is Arundel 471); complete)

a266Txt3London, BL Arundel 471 (second of two volumes (other volume is Arundel 485); complete)

a266Txt3Monte Cassino, Bibl. Abbazia 31 (first of three volumes (other volumes are 32 and 33); complete)

a266Txt3Monte Cassino, Bibl. Abbazia 32 (second of three volumes (other volumes are 31 and 33); complete)

a266Txt3Monte Cassino, Bibl. Abbazia 33 (third of three volumes (other volumes are 31 and 32); complete)

a266Txt3Nürnberg, Stadtbibl. II 59 (first of two volumes (other volume is I 24); complete)

a266Txt3Nürnberg, Stadtbibl. I 24 (second of two volumes (other volume is II 59); complete)

a266Txt3Paris, BN lat. 3895 (2 volumes; complete)

a266Txt3Reims, BM 714 (first of two volumes (other volume is MS 715); complete)

a266Txt3Reims, BM 715 (second of two volumes (other volume is MS 714); complete)

a266Txt3Valencia, Bibl. Catedral 30 (first of four volumes (30–33); complete)

a266Txt3Valencia, Bibl. Catedral 31 (second of four volumes (30–33); complete)

a266Txt3Valencia, Bibl. Catedral 32 (third of four volumes (30–33); complete)

a266Txt3Valencia, Bibl. Catedral 33 (fourth of four volumes (30–33); complete)

a266Txt3Città del Vaticano, BAV Vat. lat. 1445 (first of two volumes (other volume is Vat. lat. 1446); complete)

a266Txt3Città del Vaticano, BAV Vat. lat. 1446 (second of two volumes (other volume is Vat. lat. 1445); complete)

a266Txt3Berkeley, Univ. Cal. (Berkeley), Law Libr. Robbins 8 (books 1 and 2 only)

a266Txt3Firenze, Bibl. Laurenz. Fesul. 116 (books 1 and 2 only)

a266Txt3Leipzig, Universitätsbibl. 902 (books 1 and 2 only)

a266Txt3London, BL 10.E.VII (books 1 and 2 only)

a266Txt3Madrid, BN 674 (books 1 and 2 only)

a266Txt3Milano, BN AE.XIV.14 (books 1 and 2 only)

a266Txt3München, BSB Clm 28152 (books 1 and 2 only)

a266Txt3Paris, Bibl. Arsenal 1210 (books 1 and 2 only)

a266Txt3Paris, BN lat. 3999 (books 1 and 2 only)

a266Txt3Paris, BN lat. 8927 (books 1 and 2 only)

a266Txt3Reims, BM 716 (books 1 and 2 only)

a266Txt3Reims, BM 717 (books 1 and 2 only)

a266Txt3Siena, BC G.IV.25 (books 1 and 2 only)

a266Txt3Toledo, Bibl. Catedral 12–1 (books 1 and 2 only)

a266Txt3Torino, BN Universitaria D.I.5 (386) (first of two volumes (other volume is D.I.6); books 1 and 2 only)

a266Txt3Torino, BN Universitaria D.I.6 (387) (second of two volumes (other volume is D.I.5); books 1 and 2 only)

a266Txt3Città del Vaticano, BAV Vat. lat. 1444 (books 1 and 2 only)

a266Txt3Washington, D.C., LC Law H 6 (books 1 and 2 only)

a266Txt3Cambridge, Pembroke Coll. 182 (books 3, 4, and 5 only)

a266Txt3Épinal, BM 43 (unconfirmed contents in manuscript; possibly containing books 3, 4, and 5)

a266Txt3El Escorial, Bibl. San Lorenzo V.I.3 (books 3, 4, and 5 only)

a266Txt3Firenze, Bibl. Laurenz. Fesul. 117 (books 3, 4, and 5 only)

a266Txt3Paris, Bibl. Mazarine 1314 (books 3, 4, and 5 only)

a266Txt3Paris, BN lat. 3998 (books 3, 4, and 5 only)

a266Txt3Rouen, BM 744 (E.5) (books 3, 4, and 5 only)

a266Txt3Toledo, Bibl. Catedral 28–8 (books 3, 4, and 5 only)

a266Txt3Troyes, BM 73 (books 3, 4, and 5 only)

a266Txt3Città del Vaticano, BAV Vat. lat. 2545 (books 3, 4, and 5 only)

a266Txt3Città del Vaticano, BAV Vat. lat. 2546, fols. 1ra–205vb, 246ra–370va (books 3, 4, and 5 only)

a266Txt3Vendôme, BM 83 (books 3, 4, and 5 only)

a266Txt3Amiens, BM 369, fols. 2r–56r (book 4 only)

a266Txt3Bamberg, Staatsbibl. Can. 57 (P.III.5), fols. 1–63 (fragment, 5.38.14–end)

a266Txt3Cambridge, Univ. Libr. 1763 (Ii.II.30), fols. 2r–51r (book 4 only)

a266Txt3Firenze, Bibl. Laurenz. Aedil. 78 (book 1 only)

a266Txt3Halle, Universitäts- u. Landesbibl. Ye in folio 45 (contents unconfirmed; possibly book 1)

a266Txt3München, BSB Clm 13015 (book 1 only)

a266Txt3Paris, BN lat. 3996, fols. 1r–182v, 189r (book 1 only)

a266Txt3Paris, BN lat. 4006 (fragments: 1.10.5–1.39.33, 2.1.1–2.17.3, book 4 complete, 5.1.1–5.12.12)

a266Txt3Reims, BM 718, fols. 25r–142v (fragment 1.43.10–2.28.3)

a266Txt3Città del Vaticano, BAV Vat. lat. 2547, fols. 1r–50v (book 4 only)

a266Txt3Wien, ÖNB 2055 (book 3 only)

a266Txt3Wien, ÖNB 2114, fols. 73r–115r (book 4 only)

Decretum electionis, after 1253.

München, BSB Clm 4111, fol. 40r–45v

a266Txt4München, BSB Clm 9662, fol. 1a–5a, col. 1 (This manuscript and the following three have been identified by Andreas Their and Giulietta Voltolina.)

Sankt Florian, Stiftsbibl. XI.79 fol. 147r–151r

Wien, ÖNB 2209, fol. 50a–54a, col. 1 in pr.

Wien, ÖNB 2238, fol. 1a–9b

Summa, c. 1253.

Roma, 1473 (Hain 8959) (GW 12231).

Roma, 1477 (Hain 8960) (GW 10 Sp.647a). GW marks this as ‘nicht nachweisbar’.

Augsburg, 1477 (Hain 8961) (GW 12232) (online). BSB copy in 4 vols. (bk. 1, bk. 2, bks. 3–4, bk. 5).

Strasbourg, 1478–1479 (Hain 8962) (GW 12233).

Venezia, 1480 (Hain 8963) (GW 12234) (online).

Venezia, 1487 (Hain 8964) (GW 12235) (online).

Venezia, 1490 (Hain 8965) (GW 12236) (online). The BSB suggests that the date is more likely to be 1480.

Venezia, 1498 (Hain 8966) (GW 12237).

Paris, 1512.

Lyon, 1537.

Lyon, 1542. Reprint Aalen 1962.

Venezia, 1574 (online). Reprint Torino 1963; the web version is a scansion of the reprint into pdf format and is downloadable only.

Lectura on the Novellae I–II of Innocent IV.

Strasbourg, 1512. after the Lectura on the Decretals of Gregory IX.

Paris, 1512.

Venezia, 1581. Reprint 1965, much less reliable than Strasbourg and Paris 1512.

Lectura on the Decretales Gregorii noni.

Lectura sive apparatus domini Hostiensis super quinque libris decretalium. Strasbourg, 1512. Second recension.

Paris, 1512. Second recension.

Venezia, 1581. Derived from Paris 1512; reprint Torino 1965; both are less reliable than Strasbourg 1512.

Quaestio.

Ed. K. Pennington in BMCL, 16 (1986) 94–96.

A. Padovani, ‘I laici nella canonistica medievale (secoli XII-XV)’, Ius ecclesiae , 32 (2020) 146–150.

P. Alexandrowicz , ‘Leges non dedignantur sacros canones imitari: Canonical Reinterpretation of Justinian’s Novel 83.1 (=Authen. 6.12.1) in Lucius III’s Decretals ’, BMCL, 35 (2018) 191–204.

J. Ferrer Ortiz, ‘Enrique de Susa (el Ostiense)’, in Juristas universales 1.444–8.

C. Reid, ‘May a Man Marry a Man: Medieval Canon Lawyers and Theologians Analyze Same-Sex Unions ’, BMCL, 31 (2014) 205–236.

U.–R. Blumenthal, ‘A Gloss of Hostiensis to X 5.6.17 (Ad liberandam)’, BMCL, 30 (2013) 89–122. (Includes a critical edition of the gloss based on two printed editions and three manuscripts containing different recensions.)

H.-J. Becker, ‘Hostiensis (um 1194–1271)’, in Handwörterbuch zur deutschen Rechtsgeschichte (2011) 2.1137–38.

E. Schrage, ‘Vincentius Bellovacencis und Henricus de Segusio (Hostiensis)’, in Festschrift für Rolf Knütel zum 70. Geburtstag, H. Altmeppen, ed. (Heidelberg 2009) 1.1093–1101.

C. Reid, ‘Paulus Vladimiri, the Tractatus Opinio Hostiensis, and the Rights of Infidels’, in Sacri canones servandi sunt: Ius canonicum et status ecclesiae saeculis XIII–XV, P. Krafl, ed. (Opera Instituti historici Pragae C–19; Praha 2008) 418–23.

L. Kéry, Gottesfurcht und irdische Strafe: Der Beitrag des mittelalterlichen Kirchenrechts zur Entstehung des öffentlichen Strafrechts (Konflikt, Verbrechen und Sanktion in der Gesellschaft Alteuropas, Symposien und Synthesen 10; Köln 2006) 370–686.

B. d’Alteroche, ‘Le statut du pallium dans le droit canonique classique de Gratien à Hostiensis (vers 1140–1270)’, RHD, 83 (2005) 553–86.

C. Rider, ‘Between Theology and Popular Practice: Medieval Canonists on Magic and Impotence’, in Boundaries of the Law: Geography, Gender and Jurisdiction in Medieval and Early Modern Europe, A. Musson, ed. (Aldershot 2005) 53–66.

R. Kay, ‘Hostiensis’, in Medieval Italy: An Encyclopedia (2004) 515–16.

C. Reid, Power over the Body, Equality in the Family: Rights and Domestic Relations in Medieval Canon Law (Emory University Studies in Law and Religion; Grand Rapids 2004) 5, 16, 46, 49, 53–54, 77–78, 80, 84–85, 92–95, 102–3, 112–18, 121, 124, 133–34, 146–49, 171–73, 206–8.

D. Böttcher, ‘Die Protestatio dargestellt an Hostiensis und Panormitanus zu Liber Extra 1.2.9’, ZRG Kan. Abt., 89 (2003) 415–62.

C. Reid, ‘“So It Will Be Found that the Right of Women in Many Cases Is of Diminished Condition”: Rights and the Legal Equality of Men and Women in Twelfth and Thirteenth-Century Canon Law’, Loyola of Los Angeles Law Review, 35 (2001/02) 472, 477, 488–89, 495, 504–8.

F. Soetermeer, ‘“Summa archiepiscopi” alias “Summa copiosa”: Some Remarks on the Medieval Editions of the “Summa Hostiensis”’, in A Ennio Cortese (Roma 2001) 3.280–98. (Also in Ius Commune 26 (1999).)

R.H. Helmholz, ‘Money and Judges in the Law of the Medieval Church’, University of Chicago Law School Roundtable, 8 (2001) 319–21.

T. Pécout, ‘Hostiensis or Henry of Susa († 1270)’, in Encyclopedia of the Middle Ages (2000) 1.694.

L. Kéry, ‘Aleas fuge: Hostiensis und das Glücksspiel’, in Grundlagen des Rechts: Festschrift für Peter Landau zum 65. Geburtstag, R.H. Helmholz, ed. (Paderborn 2000) 491–522.

G. Brugnotto, L’“aequitas canonica”: Studio e analisi del concetto negli scritti di Enrico da Susa (Cardinal Ostiense) (Testi gregoriana, Serie diritto canonico 40; Roma 1999).

F. Soetermeer, ‘“Summa archiepiscopi” alias “Summa copiosa”: Some Remarks on the Medieval Editions of the “Summa Hostiensis”’, Ius Commune, 26 (1999) 1–25. (Also in Festschrift for Ennio Cortese (2001).)

P. Payer, ‘The Origins and Development of the Later Canones Penitentiales’, Mediaeval Studies, 61 (1999) 81–105.

J. Van Engen, ‘Professing Religion: From Liturgy to Law’, Viator: Medieval and Renaissance Studies, 29:01:00 (1998) 334, 337–39, 341.

K. Pennington, ‘Enrico da Susa, detto l’Ostiense (Hostiensis, Henricus de Segusio o Segusia)’, in DBI (1993) 42.758–63. Reprinted in: idem, Popes, Canonists, and Texts 1150–1550 (Collected Studies Series 412; Aldershot 1993) no. XVI, in English with the title ‘Henricus de Segusio (Hostiensis)’.

K. Pennington, The Prince and the Law, 1200–1600: Sovereignty and Rights in the Western Legal Tradition (Berkeley 1993) 48–77, 90, 150–51, 173.

M. Bertram, ‘Handschriften und Drucke des Dekretalenkommentars (sog. Lectura) des Hostiensis’, ZRG Kan. Abt., 75 (1989) 177–201.

N. Brieskorn, ‘Henricus de Segusio, päpstlicher Diplomat und Kanonist, Kardinal von Ostia (1262/kurz vor 1200–1271)’, in LMA (1989) 4.2138–39.

K. Pennington, ‘An Earlier Recension of Hostienis’s Lectura on the Decretals’, BMCL, 17 (1987) 77–90.

M. Bertram, ‘Handschriften der Summe Hostiensis mit der “Quaestio” am Ende’, BMCL, 16 (1986) 96–97.

K. Pennington, ‘A “Quaestio” of Henricus de Segusio and the Textual Tradition of his “Summa super decretalibus”’, BMCL, 16 (1986) 91–97.

E. Vodola, Excommunication in the Middle Ages (Berkeley 1986) 47, 55–6, 95–7, 115–6, 127, 146, 148–53, 161.

J. Brundage, ‘The Limits of the War–Making Power: The Contribution of Medieval Canonists’, in Peace in a Nuclear Age: The Bishops’ Pastoral Letter in Perspective, C. Reid, ed. (Washington DC 1986) 83–84. Reprinted in: idem, The Crusades, Holy War and Canon Law (Collected Studies CS 338; Aldershot 1991) no. XI.

E. Vodola, ‘Hostiensis’, in DMA (1985) 6.298–99.

K. Pennington, Pope and Bishops: The Papal Monarchy in the Twelfth and Thirteenth Centuries (The Middle Ages; Philadelphia 1984) 59, 63–74, 86, 108–14, 132–34, 146–49, 176–77, 183–89, 192–93.

J. Watt, ‘Hostiensis on Per venerabilem: The Role of the College of Cardinals’, in Authority and Power: Studies on Medieval Law and Government Presented to Walter Ullmann on his Seventieth Birthday, B. Tierney, ed. (Cambridge 1980) 99–113.

C. Gallagher, Canon Law and the Christian Community: The Role of Law in the Summa aurea of Cardinal Hostiensis (Analecta Gregoriana 208; Roma 1978).

G. Melville, ‘Zur Abgrenzung zwischen Vita canonica und Vita monastica: Das Übertrittsproblem in kanonistischer Behandlung von Gratian bis Hostiensis’,’Zur Abgrenzung zwischen Vita canonica und Vita monastica: Das Übertrittsproblem in kanonistischer Behandlung von Gratian bis Hostiensis’, in Secundum regulam vivere: Festschrift für P. Norbert Backmund O.Praem., G. Melville, ed. (Windberg 1978) 205–43.

E. Makowski, ‘The Conjugal Debt and Medieval Canon Law’, JMH, 3:02 (1977) 99–114.

B. Tierney, ‘Hostiensis and Collegiality’, in Proceedings Toronto, S. Kuttner, ed. (MIC C–5; Città del Vaticano 1976) 401–9. Reprinted in: idem, Rights, Laws, and Infallibility in Medieval Thought (Variorum Collected Studies Series 578; Aldershot 1997) no X.

J. Brundage, ‘Holy War and the Medieval Lawyers’, in The Holy War, T. Murphy, ed. (Columbus 1976) 111, 114, 118, 120–23. Reprinted in: idem, The Crusades, Holy War and Canon Law (Collected Studies CS 338; Aldershot 1991) no. X.

J. Watt, ‘The Constitutional Law of the College of Cardinals: Hostiensis to Johannes Andreae’, Mediaeval Studies, 33 (1971) 127–57.

J. Brundage, ‘A Transformed Angel (X 3.31.18): The Problem of the Crusading Monk’, in Studies in Medieval Cistercian History Presented to Jeremiah F. O’Sullivan (Cistercian Studies Series 13; Spencer MA 1971) 60. Reprinted in: idem, The Crusades, Holy War and Canon Law (Collected Studies CS 338; Aldershot 1991) no. XIII.

J. Brundage, Medieval Canon Law and the Crusader (Madison WI 1969) 82–83, 99–107, 179.

J. Brundage, ‘The Votive Obligations of Crusaders: The Development of a Canonistic Doctrine’, Traditio, 24 (1968) 111–16. Reprinted in: idem, The Crusades, Holy War and Canon Law (Collected Studies CS 338; Aldershot 1991) no. VI.

J. Brundage, ‘The Crusader’s Wife: A Canonistic Quandary’, SG, 12 (1967) 437–38. Reprinted in: idem, The Crusades, Holy War and Canon Law (Collected Studies CS 338; Aldershot 1991) no. XV.

J. Brundage, ‘The Crusader’s Wife Revisited’, SG, 14 (1967) 249. Reprinted in: idem, The Crusades, Holy War and Canon Law (Collected Studies CS 338; Aldershot 1991) no. XVI.

J. Muldoon, ‘Extra ecclesiam non est imperium: The Canonists and the Legitimacy of Secular Power’, SG, 9 (1966) 578–79. Reprinted in: idem, Canon Law, the Expansion of Europe, and World Order (Variorum Collected Studies Series 612; Aldershot 1998) no. I.

J. Muldoon, ‘The Medieval Origins of the State: The Contribution of the Canonists from Gratian to Hostiensis’, (Ph.D. diss.; Cornell University 1965).

R. Kay, ‘Hostiensis and Some Embrun Provincial Councils’, Traditio, 20 (1964) 503–12. Reprinted in: idem, Councils and Clerical Culture in the Medieval West (Variorum Collected Studies Series 571; Aldershot 1998) no VIII.

R. Winterswyl, Beiträge zum politischen Augustinismus und Neuplatonismus in der mittelalterlichen Rechtslehre, mit besonderer Berücksichtigung des Hostiensis (München 1958).

N. Didier, ‘Henri de Suse, prieur d’Antibes, prevôt de Grasse (1235?–1244)’, SG, 2 (1954) 595–617.

N. Didier, ‘Henri de Suse en Angleterre (1236?–1244)’, in Studi in onore di Vincenzo Arangio-Ruiz (1953) 333.

N. Didier, ‘Henri de Suse in évêque de Sisteron (1244–50)’, RHD, 31 (1953) 409.

C. Lefebvre, ‘Hostiensis’, in DDC (1953) 5.1211–27.

A. von Wretschko, ‘Ein Traktat des Kardinals Hostiensis mit Glossen betreffend die Abfassung von Wahldekreten bei der Bischofswahl’, Deutsche Zeitschrift für Kirchenrecht, 17 (1907) 73–88.

K. Gandert, ‘Das Buss– und Beichtwesen gegen die Mitte des XIII. Jahrhunderts vornehmlich nach Raymundus de Pennaforte, Johannes de Deo und Henricus Hostiensis’, (unpubl. diss.; Universität Leipzig 1894).

J. von Schulte, QL 2.123–29.