Its isolated location in a field near the town, and the huge and distinctive belfry which greets its visitors make this a unique example of the Romanesque style of Palencia.
Thanks to its location it is possible to see the whole of the exterior of this former collegiate church. It has a floor plan in the shape of a Latin cross, with a single nave and transept, a triple semi-circular apse, with the largest apse in the centre, thick walls and austere decoration. The cornice of the nave is supported on carved modillions. An extremely high belfry, one of the most loveliest examples in the Spanish Romanesque style, rises up at the foot of the church. It forms a single block with the façade wall, with two sections with two spaces each for bells, topped with a triangle. The openings for the bells are simple semi-circular archivolts resting on columns, with decorated capitals. It has two doorways with simple pointed archivolts, with the main one protected by a portico built more recently.