So from what I understand, they married on the 8th of June, 1236 in Zaragoza. I have been trying to find the source for that date though, or at least some record of the event. This website cites a document called the Crónica de San Juan de la Peña for their marriage. They even quote some text from the document: "la filla del Rey de Vngria…Ardeura la qual depues huuo nombre Violant nieta del Emperador de Constantin noble". However, when I tried to find the page of they cited (supposedly p. 148), I couldn't find any version of the document with more than 136 pages.
Here is a scanned version of the book, for example. I have no idea where I could find page 146 of this document in order to verify this quotation.
I'm not really any good at this sort of thing, so I figured I'd ask the people who probably are. Does anyone have any tips for me so I can figure out how to find this quotation?
I have located the passage in the Crónica de San Juan de la Peña, Aragonese version, available digitised by the Insituto Fernando el Católico. This is the text:
Et fuele dada otra muller al dito rey don Jayme, es assaber, la filla del rey d'Ongria
nombrada Ardeura, la qual depués huvo nombre Violant, nieta del enperador de Costantinnoble, de la qual procreó tres fillos: Pedro, Jayme et Sancho qui fue arcevispo de Toledo.
It is interesting, though, that in the name Ardeura there is a footnote indicating "Andreva, versión latina página 146". So, time to check the Latin version, digitised by Biblioteca Virtual Miguel de Cervantes:
Dictus vero Rex duxit in vxorem filiam regis Vngariæ vocatam Andreua, quæ postea fuit vocata Violant. Et erat neptis Imperatoris Constantinopolitani, de qua tres filios procreauit, Petrum, Jacobum et Sanctium, qui fuit archiepiscopus Tholetanus, qui archiepiscopus pro dilatatione fidei orthodoxe et exaltatione Diuini nominis fuit in Ispania contra sarracenos.
The difference is not substantial enough, and there is no specific mention of a date of marriage, or a city of marriage.
The date of the marriage, as far as I am aware comes from Próspero de Bofarull's edition of King James I's Llibre dels feyts, page 153, note 20. There he provides the date of marriage as September the 8th 1235, but he does not provide any source on which he bases that claim, though it probably comes from Jerónimo Zurita, where we can read the following:
Doña Violante, hija del rey de Hungría, casó con el rey. Este año vino la reina doña Violante hija del rey de Hungría a Barcelona, y celebráronse en aquella ciudad las bodas en la fiesta de la natividad de Nuestra Señora del mes de septiembre de este año.
Zurita is the oldest mention of a date of marriage, or even a place of marriage. You will not find any such information on any of the four major chronicles: Llibre dels feyts, Crónica de Pere el Cerimoniós, Crónica de Muntaner, and Crónica de Bernat Desclot.