The lower chapel's apse is decorated with five arches. It is from the second half of the 12th century. At a later date, maybe as early as the 13th century, there was a floor supported by a ribbed quadripartite vault inserted into the structure. The simple rectangular upper chapel was consecrated in 1411. A side door was created in the lower chapel. This is because the stonework of the raised bridge blocked the original entrance. In 1513 a pentagonal apse with gothic columns was added to the upper chapel.