Two small, high windows on the building's south side have round frames inside, but oddly squeezed, peaked frames on the outside, a sure sign of remodelling. The former priest's entrance in the south front wall is definitely Romanesque. The layman's entrance lies on the north side underneath the later enlarged window. In the west wall is found a further window. The chapel once had an oblong choir which was broken up and its opening walled up in the 18th century. Measurements of the building's inner dimensions yield a width of about 6.95 m and a length of about 10.15 m. The walls are about 1.2 m thick. The builders, however, used a "foot", believed to average about 33 cm long to do their measurements. The building stones were boulders, greywacke, on rich beds of mortar. There are no hewn stones. The inner room is a plain chamber. The building has a ridge turret as a bell tower. It never had a steeple like other churches in the area. These are the main things that set the building apart from others in the area. The inner room is further an example of one of the earliest galleries in the whole area.