It was erected in the late twelfth or early thirteenth century as a building of a single nave with steeple and topped by a semicircular apse.

It is partially surrounded by slab-graves corresponding to medieval burials.

He has subsequently been largely reformed in the sixteenth century, adding a square tower, two more naves and the sacristy.

http://es.wikipedia.org/wiki/Iglesia_de_Santa_Mar%C3%ADa_la_Real_(Las_Henestrosas_de_las_Quintanillas)