Prima expeditio sacra fuit bellum anno 1095 ab Urbano II Papa motum, qui Alexium I, imperatorem Imperii Byzantini, adiuvando speravit duas ecclesias apostolicas reconciliatum iri. Eadem expeditione etiam speravit Hierosolyma a Musulmanis liberatum iri, qui Antiochia capta ea anno 1071 expugnaverant.

Hierosolyma a Christianis die 15 Iulii 1099 capta est.

• Gesta Francorum et aliorum Hierosolymitanorum
• Petrus Tudebodus, Historia de Hierosolymitano itinere
• Baldericus Dolensis, Historia Hierosolymitana
• Guibertus, Gesta Dei per Francos
• Robertus monachus, Historia Hierosolymitana
• Radulphus Cadomensis, Gesta Tancredi
• Canso d'Antioca (fons lacunosus) cum La gran conquista de Ultramar
• Chanson d'Antioche et Chanson de Jérusalem
• Gilo Parisiensis, Historia viae Hierosolymitanae
• Albertus Aquensis, Historia Hierosolymitanae expeditionis
• Fulcherius Carnotensis, Historia Hierosolymitana
• Bartolfus de Nangeio, Historia Francorum expugnantium Iherusalem

• Gesta Francorum et aliorum Hierosolimitanorum - Liber I, Latine
• Gesta Francorum - Liber II, Latine
• Gesta Francorum - Liber VI, Latine
• Gesta Francorum et aliorum Hierosolimitanorum - Liber X, Latine

Generalia

• Steven Runciman, A History of the Crusades. 3 voll. Cantabrigiae: Cambridge University Press, 1951-1954
• Kenneth M. Setton, ed., A History of the Crusades (6 voll. Philadelphiae: University of Pennsylvania Press, 1955-1989) (Anglice) Textus

Specialia

• H. E. J. Cowdrey, "Canon Law and the First Crusade" in B. Z. Kedar, ed., The Horns of Ḥaṭṭīn: proceedings of the second conference of the second conference of the Society for the Study of the Crusades and the Latin East, 1987 (Hierosolymis: Yad Izhak Ben-Zvi, 1992. ISBN 965-217-085-2) pp. 41-48
• John France, Victory in the East: a military history of the First Crusade. Cantabrigiae: Cambridge University Press, 1994. ISBN 0-521-41969-7 (Paginae selectae apud Google Books)
• Norman Housley, "Jerusalem and the Development of the Crusade Idea, 1099-1128" in B. Z. Kedar, ed., The Horns of Ḥaṭṭīn: proceedings of the second conference of the Society for the Study of the Crusades and the Latin East, 1987 (Hierosolymis: Yad Izhak Ben-Zvi, 1992. ISBN 965-217-085-2) pp. 27-40
• J. S. C. Riley-Smith, "The First Crusade and St. Peter" in B. Z. Kedar, H. E. Mayer, R. C. Smail, edd., Outremer: Studies in the History of the Crusading Kingdom of Jerusalem presented to Joshua Prawer (Hierosolymis: Ben-Zvi Institute, 1982. ISBN 965-217-010-0) pp. 41-63

• Hugo de Paganis