Abbot Uros was an outstanding figure in the history of the Hungarian medieval church. He was not only very active in his own monastery, but also in the affairs of the Kingdom of Hungary, and according to sources he was a very strong-willed person. The rebuilding of the church of Pannonhalma is also attributed to him. Thus, as the builder of the church, Uros was entitled to a central, prominent burial place in the new early Gothic church, consecrated in 1224. 

It has been suggested that the carbon isotope dating of the skeleton might provide a means of verifying the identity of the deceased. Therefore, with the support of the Archabbey’s leadership and the monastic community, the remains were re-exhumed at the end of 2023. The sample from the skeleton was analyzed in the radiocarbon laboratory of CEZA in Mannheim, Germany. Alas, the results dated the bones to the 14th century (cal AD 1286–1389), which did not confirm the linkage of the remains to Abbot Uros.

Maintaining the original starting points, the person we were looking for was most likely to be found among the notable abbots of the 14th century, given the radiocarbon dating. At least a dozen, including several prominent abbots, were active in Pannonhalma in the time frame obtained, but among them, the persons of Sigfrid (1355–1365) and László Czudar (1365–1372) stand out. Their monumental stone slabs can still be seen in the nave of the basilica.