It is the most representative element of the town of Peñalba de San Esteban.

Its masonry, made of plastered ashlar, dates from the end of the 15th century or the beginning of the 16th century. It is a temple with a single nave and a flat chancel to which a sacristy has been attached on the north side and a funeral chapel on the south side where the heraldry of D. Juan Sebastián and Ana Otañez (1621) can be found. At the foot of the church stands a bell tower.

However, the most characteristic feature of this church is its porticoed gallery. Located to the south, it is coeval with the church and is an example of the inertia experienced by this architectural typology of the Soria Romanesque (and originated in the Church of San Miguel de San Esteban de Gormaz), which lasted until the Renaissance period.

It is not, therefore, a Romanesque porticoed gallery, as we had always thought, but a Renaissance one, although one of the best of its style.

It seems that the oldest part of the temple is its doorway with a semicircular arch and slight flaring, probably from the 14th century, being the part that has remained from the previous construction.

The altarpiece dates from 1566 and is the work of Francisco de Logroño.

Its baptismal font is late Romanesque.