The church occupies the most strategic place of the town; like a small fort, it dominates the territory and its steps from the height that gives the steep hill where Castañar de Ibor sits. It is the strongest place and most probably, the first embryo of the population.
The complex has four distinct parts: central nave, apse, tower and side naves (chapel and sacristy). The nave is rectangular, with an east-west orientation.