Escurolles - Saint-Cyr-et-Sainte-Julitte

The parish of Escurolles was given to Cluny in 953/054 by Ermengarde, (probably) the wife of Archambaud I de Bourbon, Seigneur de Bourbon (yes, this is where the illustrious name derived from). The church Saint-Cyr-et-Sainte-Julitte was built 11th/12th century. It has a nave and two aisles. The church is known for some pretty archaic carvings.

This capital is from the nave.

There is a circel, centered by a cross. This may be just "meaningless" decoration, or as specific symbol. Sun? And then there is this very simple face on the corner, squeezed under the upper rim. If the circle stands for the full sun (with 14 sunrays), then this face could be is the waning moon. It is round - and so fascinating simple. There is even a small mouth.
And why is the capital so empty all around? Did the sculpter not get a propper pay? Or is this the empty sky between sun and moon.
Unfortunately I do not take a photo of the left side.... Zut!