Boleslaus, Bishop of Vác
It is possible that Boleslaus is identical with that unnamed provost of Buda, who was mentioned in a royal charter of 1178 with dubious authenticity, which only preserved the first letter of his name ("B"), but this may also apply to his successor Barnabas.
For his participation, Béla III granted the king's share (one third part) of the port duty of Szolnok along the river Tisza to Boleslaus, who also acquired the village of Kabala with the approval of the monarch.
[9] Immediately after his election, Boleslaus requested the permission of Pope Celestine III to hold annual diocesan synods on 8 September (Nativity of Mary), who approved in 1193.
In order to financially support his bishopric, Boleslaus waived his share (a quarter, called quarta episcopi) of the tithe in favor of the lower clergy and vicars.
[10] The bishop invited Premonstratensian monks to Hungary, and the new monastery directly connected to the religious order's mother house, the Prémontré Abbey as its filial church.
Érszegi refuted some of Erdélyi's argument, who claimed the charter contains numerous anachronistic elements, for instance Andrew's heir Béla was referred to as king.
According to the document, Boleslaus donated and bequeathed large-scale landholdings in Zemplén – Királyhelmec (Kráľovský Chlmec), Kisdobra (Dobrá), Pólyán (Poľany), Csernyő (Čierna), Kisgéres (Malý Horeš), Agárd, Vajdácska –, Szabolcs (Kanyár) and Ung – Nagykapos (Veľké Kapušany), Kiskapos, Sislóc, Lakárd (Lekárovce), Trask, Szalóka and Viszoka (Vysoká nad Kysucou) – counties to the newly established convent continuously since the early 1190s, which acts were confirmed by Andrew II in a single document, in accordance with contemporary tradition to avoid later possible disagreements.
[13] "[...] It really got to Our ears, that in the first week of the past Lent, on the Wednesday of Ember days [10 March 1199], in the evening gloom, when Our Reverend Brother, [Boleslaus], the Bishop of Vác sang Compline with his fellow canons, you [Emeric], arriving to the Vác Cathedral, ordered them to hand over the keys of the sanctuary to you and the bishop [Boleslaus] leave the church [cathedral]; and when he was afraid of the trap set against him, as it gave rise to very strong suspicion for the [late] hour, he was reluctant to obey the royal command, you ordered: the gate of the sanctuary shall be broken by force; and when this bishop and the canons, for this reason, turned to the Lord and began to sing amid tears: »O Lord, look down from thine holy house, and consider us: bow down thine ear, O Lord, to hear us.« [Bar.
Emeric's whole reign was characterized by his struggles for the supreme power against his rebellious younger brother, Duke Andrew, who used the funds that he inherited from his father to recruit supporters among the Hungarian lords (for instance, Palatine Mog and Ban Nicholas), instead of leading a crusade to the Holy Land in accordance with his vow on Béla's deathbed.
The king narrated in his letter to Pope Innocent III that the bishop maintained relationship and corresponded with Duke Andrew and the other conspirators, and guarded their group's funds at the cathedral of Vác in order to finance their rebellion against Emeric.
The king himself physically assaulted Boleslaus, while his troops broke the lock, looted the treasury and confiscated numerous documents, which allegedly contained the preparations for a planned conspiracy against the monarch.
As Boleslaus' envoys were forbidden to leave the Kingdom of Hungary, his brother Elvin departed to the Holy See to file a formal complaint against the king (alongside his own conflict with his cathedral chapter).
[19] Emeric denied any physical abuse in his reply letter, according to him, the canons of the cathedral chapter voluntarily opened the gate, and Boleslaus' involvement in the conspiracy was revealed.
Since after the incident and the subsequent civil war, several barons defected to the court of Duke Andrew, it is plausible the king had good reason to open the cathedral treasury, according to historian György Szabados.
[20] In accordance with the contemporary records, Boleslaus no longer played an active role in the rebellion of Duke Andrew during the remaining regnal years of King Emeric.
Andrew II handed over two salt-carrying ferries along the river Maros (Mureș) and two portions of salt income at Dés (present-day Dej, Romania) to Boleslaus, who also granted tax exemption at delivery in every Pentecost.
Andrew buried a part of his wife's body there and donated the other half portion of Micske to the monastery, previously owned by Boleslaus' nephew, comes Othmar, who lost the estate because of his disloyalty.
