Saint Miguel is tightly connected to Saint Mary of Eunate (8 kms west) and it is as enigmatic. There are many theories centered around these two churches.

The portal of San Miguel is very similar to the portal of Saint Mary of Eunate, but mirror inverted. Here is the upper half (and most interesting) part pf the portal.

The information given in Olcoz prefers the theory that the carvings should be seen as a calender.

Ray ("Adfinem") has done a very interesting comparative study between the carvings around this portal and the carvings of a portal in Biron (Saintonge, 400kms north). While in medieval times Olcoz and Eunate were places on the "Camino Aragonés", Biron was close to the "Via Turonensis" in Western France.

Here is the Ray´s study
www.flickr.com/photos/adfinem/sets/72157630046840688/with...