Liber Extra
It is possible that Ákos raised in the court of Coloman of Galicia-Lodomeria, a younger son of Andrew II of Hungary. Probably he studied abroad as his work proves that he had an excellent knowledge of the canon law of the Catholic Church and its reference method. Raymond of Penyafort compiled the Decretals of Gregory IX by September 1234, the Pope announced the new publication in a Bull directed to the doctors and students of Paris and Bologna, commanding that the work of Raymond alone should be considered authoritative, and should alone be used in the schools. Ákos was already referred to as "magister" in 1240, confirming that he studied arts and canon law in youth and not at peek of his ecclesiastical career.