Gertrude's brother, raped Bánk's wife, which was the immediate cause of the assassination of the queen, who acted as a procuress in the adultery. According to this narration, Bánk led the conspirators and stabbed Gertrude with a sword personally. The chronicle was compiled by a Hungarian cleric in Klosterneuburg Abbey, Lower Austria around 1270. The chronicle claims that Béla IV ordered to slaughter all participants of the assassination, after he ascended the Hungarian throne in 1235. Its text was utilized by the Dominican Annals of Vienna ("Annales Praedicatorum Vindobonensium") at the end of the 13th century. In addition, the annals used other source too, since, unlike the Austrian Rhyming Chronicle, it mentions Bánk's alleged German name ("Prenger") and the exact date of the assassination. The 14th-century Illuminated Chronicle ("Chronicon Pictum") took over the story too, which then made a decisive contribution to making the story rooted in the Hungarian chronicle and historiographical tradition and, subsequently, the Hungarian-language literature and culture. The fact that Bánk held court positions even after the assassination questions the authenticity of the above accounts, or at least his leading role in the conspiracy. Historian Gyula Pauler considered Bánk managed to survive the subsequent retaliation, because Andrew II was not strong enough to punish one of the most powerful barons, while the main assassin Peter, son of Töre was executed. According to János Karácsonyi, Bánk supported the conspiracy, but he did not mastermind the crime. Historian Erik Fügedi argued Bánk was the most prestigious member of the conspiracy, which in the following decades magnified his role and thus became the executor and chief of the assassination in the later narratives. Historian Pál Engel considered Andrew II had no choice but to be forgiving because he was supported by no more than a handful of barons, therefore only the actual killer Peter was impaled. Pauler argued Duke Béla persuaded his father to punish the assassins of his late mother – including Bánk –, after Andrew was forced to authorize his son to revise his previous land grants in 1228. In that year, Duke Béla confiscated the estates of two noblemen, brothers Simon and Michael Kacsics, who were also accused of plotting against Queen Gertrude. Tamás Körmendi emphasized the late 19th-century historiography incorrectly considered Andrew II as a weak ruler. Körmendi argued Bánk was accused of involvement in the assassination sometime only between 1222 and 1240. Along with other