Nicholas () was a 12th-century prelate in the Kingdom of Hungary. He was Archbishop of Esztergom between 1181 and 1183, and Bishop of Várad (now Oradea in Romania) from 1163 to 1181. Head of the royal chapel The earliest record of Nicholas — a charter of grant of Géza II of Hungary to the Óbuda Chapter — refers to him as the head of the royal chapel in 1148. He is the first leader of the royal chapel whose name was recorded. The royal chapel was an important office of the royal administration. Being the head of the royal chaplains, Nicholas signed at least four royal charters between 1148 and about 1157. For instance, he appears as the attestor (sigillator) of the last will and testament of lady Margaret in Pannonhalma (an important source of 12th-century Hungarian economic history) in 1152. He was styled as count (ispán) of the royal chapel (, ) between around 1156 and 1158, when Géza confirmed a land donation to the Garamszentbenedek Abbey (today Hronský Beňadik, Slovakia). In this capacity, Nicholas supervised the convent of the royal chaplains, guarded the royal relic treasures and exercised jurisdiction over those servant laymen, who secured the liturgical activity of the court clergy. Nicholas also served as keeper of the royal seal. In the chancellery, his closest associate was notary Barnabas, canon of Székesfehérvár. Prelate Nicholas is mentioned as Bishop of Várad in the only extant royal charter of Géza II's brother, Stephen IV, in 1163. Stephen IV had seized the throne with Byzantine support from Géza II's minor son, Stephen III. The presence of Nicholas among the signatories on Stephen IV's charter evidences that he supported the usurper, along with his superior, Mikó, Archbishop of Kalocsa. A 14th-century (1370s) regulation (statutum) of the cathedral chapter of the Diocese of Várad refers to Nicholas as bishop, "who was head of the Várad Church around the beginning of the reign of Béla III of Hungary" (thus around 1172). This suggests that Nicholas, similarly to other prelates, managed to retain his influence and position after the fall of Stephen IV. Nicholas functioned as Bishop of Várad until no later than 1181. His successor John is mentioned in the bishop list of the Várad Chapter with the year 1180, which was corrected to 1181 by historians Vince Bunyitay and Gábor Thoroczkay. Nicholas was elected Archbishop of Esztergom following the death of Lucas,