The golden age of the monastery was under the reign of Andrew II., the son of Béla III. The second wife of Andrew II., Yolanda Courtenay was in contact with the main abbey of Egres, Pontigny because it was the burial church of Courtenay family. Andrew II. probably liked the community of Egres due to the influence of his wife, Jolánta, which received many generous royal donations from 1224. There is no doubt that Egres has the same role in the last decade of the life of the royal couple, as Pontigny to the parents of Yolanda. The deceased queen was buried here in 1233.

We know that in the last year of Andrew’s life, Gregory pope IX. re-affirmed the donation of the king and the exchange of the estate between Egres and himself. It could have included a mass foundation for both her own and her second wife. The king also wants the monastery of Egres to have a main role during his efforts to proselytize the Kun people. Later according to reliable sources II. Andrew was also buried here.