In 1994, during renovations of the Pannonhalma basilica, an undisturbed grave was discovered in the middle of the nave, in the monks' choir. The remains of a coffin were found in the rock-cut grave, in which lay a poorly preserved skeleton without any grave goods. An anthropological examination carried out by Kinga Éry concluded that the remains belonged to a tall, robust man aged 54-68 years. Following the investigations, the remains were returned to their original burial site in a wooden box.

The question has been raised among experts and the Benedictine community as to who could be the person buried in such a prominent and central place, without any grave goods. In any case, the puritanical nature of the burial suggested that the deceased belonged to the monastic community. All this led to suspicions that the deceased may be Abbot Uros who was the leader of the monastery of St. Martin between 1207 and 1243.