The Irmenach church might originally have been Saint Peter's Church, even though the old local lore held that it was consecrated to Saint “Irmel” (Irmina) or that at the very least there was an altar consecrated to Irmina. Whatever the truth is, it seems that there were pilgrimages to the Irmenach church. Of the older church buildings, the lowest part of the tower may be all that is left; this may date from about 1200, whereas the tower and the nave were built later. Preserved to this day, however, are the old bells () from 1423, 1514 (poured by Hans von Breisig) and 1555 (poured by Johann von Trier). In 1871 and 1872, a new nave was built in Irmenach, as the one that had stood until then had become too small for the community. This was not accomplished before an acrimonious dispute between the two centres, for the Beuren dwellers were of the opinion that any new church building should happen in their village. When the old church was torn down, the paintings, of which there is no doubt there were many, were all lost; such artworks can still be found at Lötzbeuren and Raversbeuren. The historical Stumm organ from 1776, though, was preserved.