"it [the race of the Turks] has led away a part of the captives into its own country, and a part it has destroyed by cruel tortures; it has either entirely destroyed the churches of God or appropriated them for the rites of its own religion. They destroy the altars, after having defiled them with their uncleanness. They circumcise the Christians, and the blood of the circumcision they either spread upon the altars or pour into the vases of the baptismal font. When they wish to torture people by a base death, they perforate their navels, and dragging forth the extremity of the intestines, bind it to a stake; then with flogging they lead the victim around until the viscera having gushed forth the victim falls prostrate upon the ground. Others they bind to a post and pierce with arrows. Others they compel to extend their necks and then, attacking them with naked swords, attempt to cut through the neck with a single blow. What shall I say of the abominable rape of the women? To speak of it is worse than to be silent."
Madden, Thomas (2014-03-16). The Concise History of the Crusades. Rowman & Littlefield. p. 264. ISBN9781442215740.
deutsche-biographie.de
Holzfurtner, Ludwig. "Metullus von Tegernsee". Deutsche Biographie. Bayerische Akademie der Wissenschaften. Retrieved 1 June 2019.
Gabriele, Matthew (2016). "From prophecy to apocalypse: the verb tenses of Jerusalem in Robert the Monk's Historia of the First Crusade". Journal of Medieval History. 42 (3): 304–316. doi:10.1080/03044181.2016.1158733. S2CID159829585.
Gabriele, Matthew (2016). "From prophecy to apocalypse: the verb tenses of Jerusalem in Robert the Monk's Historia of the First Crusade". Journal of Medieval History. 42 (3): 304–316. doi:10.1080/03044181.2016.1158733. S2CID159829585.
