Between the 2nd and 15th of May 2005, the Haáz Rezso Museum at Odorheiu-Secuiesc organized an archaeological excavation at the medieval church ruin of Ulieş, with the participation of some students from the University of Cluj-Napoca. The church of Ulieş (the village first was mentioned in the papal decimals from 1332-1337) was mentioned the first time at the middle of the 17th century, when there happened a renovation. The church was destroyed at the end of the 18th century; the ruins are clearly visible in our days, too. The archaeological research focused on the S-SE part of the sanctuary of the medieval church, because the “Saint Church’s River” damaged this part of the graveyard, and it is in the danger of total destruction. The second section was established in the west part of the site, beside the stonewalls of the graveyard. In the 1st section we found the foundations of the late Gothic church with two pillars and its pavement of brick. The building dates to the second part of the 15th century (dated with a denier of King Mathias – 1465), when the rectangular sanctuary of the Arpadian church was pulled down. The researched graves around the sanctuary (32 skeletons) dates to the early period of the graveyard, because during the Late Middle Ages the river began to cut into east part of the churchyard, and this was the reason why there were no more funerals after the Early Middle Ages. From the grave period, we can surely recognize an earlier grave horizon, which was destructed by the rectangular wall of the sanctuary. This aspect and some secondary built-in carved stones in the foundation of the sanctuary prove the existence of an earlier church, which was probably built in the 12th century. From the earth filling of the graves, mostly without any artifacts, we can mention three silver jewels, which must have come from the partially destroyed graves. The finds include a lot of coffin nails, sherds and some fresco pieces.