Ugrin Csák, Archbishop of Esztergom

[3] In his last will and testament in 1231, Nicholas Csák, who served as ispán of various counties in the first half of the 13th century, referred to Ugrin as his frater, literally "brother", but it most likely means "uncle" in this context.

[5] Historian Attila Zsoldos analyzed the document in detail and revealed the contradictions between archontological data, which still exist despite that historiographical efforts which tried to correct the charter's date to 1183 or 1185.

Béla III welcomed Frederick in Esztergom, and dispatched a troop of 2,000 soldiers led by Ugrin Csák to escort the crusaders across the Balkan Peninsula.

He hired church architects from Esztergom and Kalocsa to renovate and expand its walls and plinth, combining the Romanesque and Gothic art elements.

[2] After the death of Béla III, Ugrin was the staunchest supporter of his successor Emeric,[11] whose whole reign was characterized by his struggles against his rebellious younger brother, Duke Andrew.

[12] Pope Celestine III urged Ugrin to stay in the king's faithfulness, when Andrew forced Emeric to make him ruler of Croatia and Dalmatia as appanage.

[9] When Emeric accused, in 1203, Kalán Bár-Kalán not of murdering his father (Béla III) but of maintaining an illicit relationship with his own niece, the skeptic Pope Innocent secretly entrusted Ugrin to investigate the truth of the allegations.

[9] However, Ladislaus III was crowned on 26 August 1204 by John, Archbishop of Kalocsa, which fact suggests that Ugrin died suddenly not long before that date.