Two medieval windows were discovered at the Calvinist church of Becheni during a restoration in 2004. In order to clarify their origin and the former phases of the building, an archaeological excavation was carried out in September 2005, preceding the renovation of the church-floor. Four sections were opened, three inside and one at the outside. The foundations of a rectangular sanctuary were revealed in the eastern part of the building, which formed together with the south wall, containing the two windows, the remaining part of a medieval church. This church has a small rectangular nave identical to the east part of the present church. 13 inhumations were revealed both inside and outside, all of them being deepened down to the level of the soil-water. One of them (M6) had grave goods at the middle of the body: a silver bell-fastener with chain.