San Salvador Church in Salvatierra de Esca is composed of a single nave with a star-ribbed vaulted ceiling in three sections and chapels between the buttresses. There is also a beautiful choir gallery at the western end. The church’s present structure is the result of a number of significant modifications. Most important among these were the changes made by Pedro de Ustarroz at the end of the 16th century with the building of a sacristy within the chancel area and those carried out by Pedro Estaburu a century later, when the tower with its fortress-like crenellations was added to the western end.

Stonemasonry was used for the main nave and the tower, whereas the sacristy was constructed of perfectly right-angled ashlar. The external aspect of the building is remarkable for its solidity which contrasts with the graceful interior. Thick pillars support the sacristy which it is possible to walk under. It rests on a low ribbed vault decorated with coffers and unique in the Alto Aragon area.

The collection of art inside the church is of considerable interest and gives it great beauty and harmony. The “Ecce Homo” bust is worth pointing out as is the spectacular main altarpiece in the Barroque style dedicated to St Saviour. The latter was made between 1686 and 1731 and consists of a first level divided into three sections by Solomonic columns and a profusely decorated penthouse section. The main section is dominated by a sculpture of the Saviour, accompanied by San Juan Bautista – as Precursor –and St Joseph. The penthouse depicts Calvary with the figures of St Peter and St Paul.

The other altarpieces, dating from the 17th and 18th centuries, are dedicated to the Sacred Heart of Jesus, St Michael, the Immaculate Conception, la Virgen del Rosario, Saints Nunilo and Alodia, St Blas, la Virgen de la Peña, the Holy Christ, St Wadesca and Ecce Homo. It is worth mentioning the magnificent organ adjacent to the choir.