His brothers were Bás (II) and Pós (or Pous),[2] who served as Master of the treasury and Ban of Severin in 1235, and was considered an influential courtier of Duke Béla of Transylvania.

[11] Thereafter, the joint cathedral chapters of Kalocsa and Bács (present-day Bač, Serbia) sent the provost of Hájszentlőrinc and the archdeacon of Bodrog to the Roman Curia in order to request Pope Honorius III to confirm Ugrin's election.

[12] Theologians Augustin Theiner and József Udvardy argued Ugrin himself and some of the canons visited the Holy See, where the archbishop-elect made a good impression on the pope, who then confirmed his election and personally consecrated him as bishop.

[14] Consequently, Pope Honorius rebuked John, because he unduly exercised jurisdiction over royal churches in the Archdiocese of Kalocsa, in violation of the privilege of the newly elected Ugrin Csák.

The strengthening of secular barons soon smoothed out the internal hierarchical conflicts of the Church in the following decades, and Ugrin no longer tried to increase the influence of his archdiocese to the detriment of Esztergom.

[14] It is possible that Ugrin was present in England on 7 July 1220, when Thomas Becket's remains were moved from his first tomb to a shrine, in the recently completed Trinity Chapel.

The event was attended by King Henry III, the papal legate Pandulf Verraccio, the Archbishop of Canterbury Stephen Langton and large numbers of dignitaries and magnates secular and ecclesiastical throughout from Europe.

[16] Around 1220 or 1221, Ugrin, alongside other lords and prelates, for instance Nicholas Szák and Bishop Robert of Veszprém, pledged to return to the Holy Land and fight against the Ayyubid Sultanate.

[21] The pope authorized Ugrin and his suffragans to supervise the "harmful" royal land grants made by King Andrew II in his ecclesiastical province in August 1225 (he had called him for this before, as early as 1220).

In December 1233, Ugrin merged the revenues of the Hájszentlőrinc Chapter, founded by Queen Anna of Châtillon, into the Archdeacony of Bodrog, whereas the former's sources of income had dwindled by then, so he had integrated the provostry into the organizational structure of the archdiocese.

During the conclusion of the Oath of Bereg (August 1233), papal legate James of Pecorara instructed Ugrin and four other Hungarian prelates, whose dioceses were inhabited by a significant number of Muslim or Jewish communities, to separate those people from Christian settlements and ensure the permanence of segregation during their annual cruises.

Already in the early 13th century, the Hungarians turned to Rome, complaining to Pope Innocent III that the Bosnian Church was a centre of heresy, based on the refuge that some Cathars (also known as Bogomils or Patarenes) had found there.

[27] The Hungarian king placed the provinces of Bosnia, Ozora (Usora) and Só (Soli) under the suzerainty of the Archdiocese of Kalocsa in order to support Ugrin's efforts against the heretics.

[28] According to historians Dominik Mandić and Ivan Majnarić, Acontius and Ugrin summoned a large crusader army and attacked Bosnia, whose defense rushed unprepared for war and suffered heavy losses in the period between 1221 and 1222.

[28][29] As a preparation of war against the heretics, Ugrin handed over a wage of 200 marks of silver to John Angelos, a nephew of Andrew II, in order to invade Bosnia on behalf of the Hungarian monarch.

As a result, he bought the royal fortress of Požega from Andrew II and Duke Béla in exchange for his inherited lordship of Érdsomlyó in Krassó County (present-day Vršac, Serbia) sometime before 1227.

[34] Prior to 1229, Ugrin Csák asked for permission to establish a Roman Catholic diocese in Syrmia in order to facilitate the conversation of Bosnian heretics.

After a report compiled by Raynald of Belleville and Desiderius, Bishop of Csanád, Pope Gregory IX approved the establishment of the Diocese of Syrmia in January 1229.

In that year, Pope Gregory commissioned Ugrin to resolve the conflict of jurisdiction between Innocent and the local archdeacon of Syrmia (a member of the cathedral chapter of Bács).

[37] Others asserted that these rumors [the Mongol invasion] were spread by some prelates of churches so that they need not go to Rome to the synod called at that time by the Roman pope [Gregory IX].

However, it was well known to all that Archbishop Ugolin of Kalocsa had ordered galleys in Venice for himself and some of his bishops, but the king called them back from the journey, against their will.Béla IV ascended the Hungarian throne in 1235.

[7] After the Emperor of Bulgaria, Ivan Asen II and the Emperor of Nicaea, John III Vatatzes, concluded an alliance against the Latin Empire and the rank of patriarch was granted to the head of the Bulgarian Church in token of its autocephaly, Pope Gregory IX sent a letter to Hungarian archbishops Robert and Ugrin Csák in May 1236 to urge them to warn Ivan Asen to refrain himself from the excommunicated John Vatatzes and the "persecution of Latins [i.e. Roman Catholics]".

The monarch complained in his letter sent to Pope Gregory that some of them (including the aforementioned Nicholas Szák) usurped much of the crown revenues and deposited it with local churches.

[40] When Baldwin II, Latin Emperor traveled to Western Europe in 1236, trying to raise money and soldiers to recover the lost territory of his realm, Pope Gregory instructed Ugrin to cooperate with his envoy Salvio Salvi, Bishop of Perugia to organize the collection of financial aid in Hungary.

Ugrin already arranged for the trip to the Republic of Venice for himself and his suffragans, when King Béla IV called them back because ominous news began to arrive from the eastern border of the country.

Ugrinus, being ever outspoken and without fear, raised his voice and began to rebuke the king [Béla IV] for his negligence and to upbraid all the Hungarian barons for their slowness and idleness, remarking that when faced with such peril they had no concern for their own lives or any resolve to defend the country as a whole.

[44] Despite that Ugrin defied the royal command, possibly feeling himself "quite experienced and respectable", and gathered his knights to launch a counterattack against the Mongol troops raiding the area.

[46] Roger of Torre Maggiore emphasized in his narration Carmen miserabile that Ugrin urged the monarch to march out against the Mongols in force, because they "were day and night burning down villages all around".

Duke Coloman, Ugrin Csák and Rembald de Voczon, the master of the Knights Templar in Hungary and Slavonia, gathered their armies and marched to the bridge, arriving there by midnight.

[48][49] According to historian János B. Szabó, the chronicler Thomas the Archdeacon arbitrarily emphasizes the courage of Duke Coloman and Ugrin, overemphasizing their role in the battle, while everyone except them turns out to be a coward and want to avoid a clash with the Mongols.