Béla's blindness prevented him from administering his kingdom without assistance. He put his trust in his wife and her brother Beloš. Both royal and private charters from Béla's reign emphasize Queen Helena's pre-eminent role in the decision-making process, proving that the king regarded his wife as his co-ruler. According to the Illuminated Chronicle, at "an assembly of the realm near Arad" in early to mid-1131, Queen Helena ordered the slaughter of all noblemen who were accused of having suggested the blinding of her husband to King Coloman. Béla distributed the goods of the executed magnates between the newly established Arad Chapter and the early 11th-century Óbuda Chapter.