One of the most important evidence of the ancient origins of Samolaco. The walls are largely buried by the debris carried by the nearby Casenda and Meriggiana streams, in memory of the numerous floods and landslides that swept away the ancient buildings of Samolaco over the years. The apse faces east, as in most ancient churches, and is held by fine Romanesque walls. On the north wall, there is a small bell tower, which was remodelled several times between the 17th and 19th centuries. According to the records left by the historian Pietro Buzzetti, it seems that the walls of the apse were entirely adorned with frescoes dating back to the 16th century. The façade features a well-preserved fresco painted in the last century by the local painter Prevosti, representing St. John the Baptist.