During 28th of March - 14th of April 2006 the Haáz Rezső Museum of Odorheiu-Secuiesc organized an archaeological excavation at the mediaeval church of Sântimbru settlement with the participation of students from University of Cluj-Napoca. The mediaeval village was settled near the town of Odorhei and was abandoned in 1577 by order of Prince Kristóf Báthory. The written sources do not mention the mediaeval church. In the course of the excavation we made two sections on the surface of the mediaeval church which had been completely destroyed by ploughing. The foundation walls of the polygonal sanctuary, its clay floor, the altar in the middle of the sanctuary and 30 graves in and around the church were discovered. The sanctuary belongs to the late phase of the church and was built in the 16th century, before the Reformation (the unbroken floor and the one-layer plaster shows that the sanctuary was built at the end of the church’s life). We did not find remains of the sacristy. On the basis of the sanctuary dimensions, the late mediaeval church was an average village-church in Odorhei County. All the graves had a shallow relative depth of 20 - 50 cm. Besides this, some factors reflect that the graves belonged to an earlier church. Some bricks built secondarily in the wall of the sanctuary, small pieces of fresco and different types of mortar which do not belong to the late phase of the sanctuary reflect the existence of an earlier church phase. The archaeological findings from the graves: jewels with an S ending, girdle-clasps, paste-pearls and one denarius of Ludovic (Anjou) the Great prove that there was a graveyard from the 13 - 14th centuries there. The wall fragment founded in the north profile of section 1 was the direct argument of this early period of the church; the polygonal sanctuary was added to this partly demolished wall. The negative area between the two groups of graves draws the mark of this demolished wall (probably a rectangular sanctuary). The arrangements made on the terrain - after demolishing these earlier walls - caused the diminution of the relative depth of the graves. The results of the excavation are in concordance with the observations made in the course of preventive terrain ramblings and complete the data of historical sources from the 16th century showing that Sântimbru village was there in the neighbourhood of Odorhei with a church from the very beginnings of it.