[3] In this capacity, he was only mentioned by the last will and testament of hospes Fulco from 1146; accordingly, the testator recalls that he served five bishops of the Diocese of Veszprém as their cleric during his life in the following order: Matthew, Nana, Martyrius, Peter and Paul.
Another charter, which donated villages to the monastery of Csatár, erected by Martin Gutkeled, ispán of Zala County, also refers to Martyrius as bishop, but without mentioning his see.
[4] According to the Annales Posonienses, Martyrius consecrated the Benedictine abbey of Széplak in Újvár County (today Krásna, Slovakia) in 1143, which was founded by the gens (clan) Aba and dedicated to Virgin Mary.
In the same year, a large number of Saxons were settled to the sparsely populated northeastern parts of the Diocese of Eger, including Kassa, Eperjes and the surrounding villages (today Košice and Prešov in Slovakia, respectively).
[8] In contemporary records, Martyrius is first mentioned as archbishop in 1152, when he appears as a witness on the occasion of the last will and testament of lady Margaret in Pannonhalma (an important source of 12th-century Hungarian economic history).
Meanwhile, with the permission of Géza, he provided the tithe of 70 villages in the surrounding Nyitra, Bars, Hont and Esztergom counties to the Chapter to finance its operation and the weekly ceremonies, in addition to the local St. Nicholas chapel as the place of convent.
[1] Some historians, for instance, László Erdélyi and Richard Marsina considered Martyrius' charter (called as "Diploma of Eusidinus" in Hungarian historiography) as a 14th-century forgery, citing anachronistic elements in the text (e.g. the words parochia or missale).
[9] Martyrius appears as a witness in a royal charter (it was possibly also issued in 1156), when Géza II donated large-scale landholdings two foreign knights Gottfried and Albert.
He and other bishops also appear in a forgery which claimed that Géza transliterated Saint Stephen's privilege donations to the Pécsvárad Abbey (as the original document have been destroyed during a fire in 1105).